Locks/Security

Bike security gets smart. The use of innovative technology, combined with maximum mechanical security, makes the 770A SmartX the most secure bike lock in its class. Enjoy the benefits of the innovative SmartX cylinder and make your iOS or Android smartphone your individualized key. Combined with the proven 100dB alarm, this lock offers maximum security for high-quality E-bikes and load-carrying bicycles. - 13mm hardened square shaft parabolic shackle - SmartX locking system with Bluetooth—high-quality, keyless locking offers user-friendly operation - Alarm function with at least 100 dB for 15 seconds followed by automatic reactivation - 3D Position Detection—detects vibrations and the smallest movement in all three dimensions and triggers the alarm - Smart alarm—the lock only emits a small warning beep in the event of minor and brief vibrations, e.g. if a football bounces nearby - USB-C port - App connection - Location storage of the bike's last parking location - ABUS power cell technology offers the highest level of protection against impacts and attempts to break open the lock - The shackle, the housing and the locking mechanism's load-bearing parts are manufactured from specially hardened steel

Bike security gets smart. The use of innovative technology, combined with maximum mechanical security, makes the 770A SmartX the most secure bike lock in its class. Enjoy the benefits of the innovative SmartX cylinder and make your iOS or Android smartphone your individualized key. Combined with the proven 100dB alarm, this lock offers maximum security for high-quality E-bikes and load-carrying bicycles. - 13mm hardened square shaft parabolic shackle - SmartX locking system with Bluetooth – high-quality, keyless locking offers user-friendly operation - Alarm function with at least 100 dB for 15 seconds followed by automatic reactivation - 3D Position Detection – detects vibrations and the smallest movement in all three dimensions and triggers the alarm - Smart alarm – the lock only emits a small warning beep in the event of minor and brief vibrations, e.g. if a football bounces nearby - USB-C port - App connection - Location storage of the bike's last parking location - ABUS power cell technology offers the highest level of protection against impacts and attempts to break open the lock - The shackle, the housing and the locking mechanism's load-bearing parts are manufactured from specially hardened steel - Security Level: 15 - Locking type: key - Carrier: USH with bracket - Length: 9-inch

Big cities call for big protection, and Kryptonite's New York Fahgettaboudit delivers with 14mm six-sided chain links made from hardened manganese steel. Wrap this burly lock around your frame worry-free thanks to the durable nylon cover that protects your bike's paint from scratches, and leave with peace of mind knowing the 15mm hardened Max-Performance steel shackle is on duty. With a double deadbolt design to protect against twist attacks, would-be thieves with an eye on your bike can fahgettaboudit because you're the only one with access to your bike with three stainless steel keys--one of which is lighted for night access!

- Physical security of the Bordo GRANIT XPlus 6500 now with an alarm. - 90cm length - Sensitive vibration alarm thanks to 3D Position Detection - Short warning tone in case of small or short movement - Alarm of at least 100 dB for 15 seconds - Automatic activation - Acoustic signals inform about battery and activity status - Inactive transport position - Easy battery replacement without tools (type CR2) - Good protection with high security

Achieve security and one-key convenience with the ABUS Bordo 6405 Folding lock/Bosch battery lock cylinder combo. - 5.5mm bars with extra-soft two-component casing to prevent damage to paintwork - ABUS Link Protection Shield for a high level of protection against hinge sawing - Ideal for securing high-value bicycles - ABUS Plus lock cylinder is keyed alike to the Bosch battery lock

Looking for the security of a U-Lock but the flexibility of a chain? Look no further than the Bordo Granit X-Plus 6500. With an ABUS security rating of 15 out of 15, this lock features temper hardened steel bars encased in an extra soft coating to protect your bike's paint job. The ABUS Link Protection Shield offers high protection from sawing of the links. The lock body, links and supporting elements of the locking system use the same high quality steel you'll find in the bars. The patented X-Plus Key cylinder offers extremely high protection from picking and it can be keyed alike with other ABUS locks featuring the same X-Plus cylinder - very convenient for multi-lock and multi-bike households. Like all locks in the Bordo family, the 6500 is simple to carry. The rattle free lock carrying case attaches easily to the frame via the silicone coated non-slip Velcro straps or screws easily into the bottle-cage mounts. - 5.5mm steel bars - Bars, links, and lock body are made of special hardened steel - Soft-touch coating on the bars and matching silicone lock body cover protects bike's paint job - ABUS X-Plus Cylinder offers extremely high protection against picking - Two keys supplied with the lock, one LED lighted - ABUS Code Card for ordering additional or replacement keys - Compact, versatile folding technology offers greater range of locking options - Length: 110cm

Big cities call for big protection, and Kryptonite's New York Chain delivers with 12mm six-sided chain links made from hardened manganese steel. Wrap this burly lock around your frame worry-free thanks to the durable nylon cover that protects your bike's paint from scratches. Leave with peace of mind knowing the 14mm hardened Max-Performance steel shackle mated to the Evolution Series 4 Disc Lock is on duty. With a double deadbolt design to protect against twist attacks, would-be thieves with an eye on your bike don't stand a chance. It includes three stainless steel keys--one of which is lighted for night access!

The GRANIT CityChain XPlus by ABUS is the original for maximum theft protection. Your bike has never been this safe before! The seven test seals from different countries speak for themselves: the GRANIT CityChain XPlus from ABUS is among the most secure bicycle locks on the international market. This lock has been awarded security level 15, the highest ABUS security system level. The chain, body, and structural parts of the locking mechanism are manufactured from specially hardened steel and make theft considerably more difficult. Technologies - 10mm hexagonal chain with textile sleeve to protect against damage to the paintwork - ABUS Power Cell technology offers the highest level of protection against impacts and attempts to break the lock - ABUS Power Link technology enables the chain to be connected directly to the Power Cell - Interwoven coating of the lock body to protect against brutal methods of attack - The chain, the lock body and supporting elements of the locking mechanism are made of specially hardened steel - ABUS XPlus cylinder for the highest level of protection against tampering, e.g. picking - Cover to protect the keyhole from contamination Usage - Excellent protection where the risk of theft is high - Ideal for securing high-value bicycles - The longer the chain, the easier the bicycle can be locked to a fixed object

The first alarmed folding lock on the market. Something to make bike thieves think twice: as well as the ultra-safe mechanical features boasted by all of the folding locks in the ABUS BORDO range, the BORDO Alarm 6000A is the first folding lock anywhere in the world to sound an alarm (at a volume of 100dB) if it detects an attempted attack. It does so thanks to the smart 3D Position Detection sensors, which detect the smallest of movements in all three dimensions. The sensor technology incorporated into the BORDO Alarm 6000A can distinguish between picking attempts and the small vibrations which occur when the lock is connected, for example, or a football bounces nearby; in these situations, the lock will emit a small warning beep but will not sound a full alarm. Acoustic signals provide information on battery level and activity status. Technology: - 13/64" bars with extra-soft two-component casing to prevent damage to paintwork - The bars and body are made of specially hardened steel - Alarm at a volume of at least 100 dB for 20 seconds, followed by automatic reactivation - 3D Position Detection – detects vibrations and the smallest of movements in all three dimensions and triggers an alarm - Smart alarm – the lock only emits a small warning beep in the event of minor and brief vibrations, e.g. if a football bounces nearby - Acoustic signals provide information on battery level and activity status - Bars are linked with special rivets - ABUS Plus cylinder for maximum protection against attempted manipulation, e.g. picking Operation and use: - Great protection where there is a high risk of theft - Ideal for securing high-cost bicycles - The longer the chain, the easier it is to lock the bicycle to a fixed object

A HIGH-SECURITY LOCK IN A CLASS OF ITS OWN Capable of withstanding even the most determined of attacks: the BORDO GRANIT XPlus™ 6500 Folding Lock is worthy of many superlatives. The BORDO GRANIT XPlus™ 6500 Folding Lock is quite literally a tough nut for bike thieves to crack since it incorporates "granite", or at least the ABUS take on it; 5.5mm bars manufactured from specially hardened steel and connected with special rivets, which offer protection against even the most determined of attacks. The ABUS Link Protection Shield ensures that these rivets are not only flexible, but also extremely resistant to attacks involving sawing. The picking-resistant XPlus precision disc cylinder from ABUS also has a lot to offer and guarantees outstanding protection against attempts at tampering. This combination has earned the BORDO GRANIT XPlus™ 6500 Folding Lock a phenomenal top score of 15 in the ABUS Security Level System.

Kryptonite's New York Fahgettaboudit is a 14mm, six-sided link chain made of triple heat-treated, boron manganese steel giving it extreme strength. The chain is covered with a durable nylon covering that protects your bike against scratches. This 3.25-foot chain secures with Kryptonite's New York Disc Lock that boasts a 15mm steel shackle for serious security. Plus, three keys are included, with one that has a high intensity LED bulb for convenient, easy unlocking in the dark. This New York Chain has an anti-theft protection offer.

The Steel-O-Chain™ 9809K Chain Lock provides great protection against theft with an XPlus locking cylinder specially developed by ABUS The ABUS XPlus cylinder built into the lock body is even more picking-resistant than its predecessor and offers excellent protection against manipulation of the bicycle lock. The 9-millimetre square chain as well as the housing and structural parts of the locking mechanism are made of specially hardened steel. The lock has been awarded ABUS security level 12 out of 15. In order to protect the paintwork on the bike in the long run, the steel chain is covered with a textile sleeve. Even the keyhole has a cover to protect it from dirt and corrosion. Well secured, your bike can be parked with no worries. - 9mm strong square chain - The chain, housing, and structural parts of the locking mechanism are made of hardened steel - ABUS Plus Cylinder - Automatic keyhole cover to prevent corrosion and the ingress of dirt

Achieve security and one-key convenience with the ABUS Bordo 6015 Folding lock/Bosch battery lock cylinder combo. - ABUS Plus Cylinder for high protection against picking manipulation - Includes Bosch lock cylinder keyed alike to folding lock - 5mm bars with extra-soft, two-component casing to prevent damage to paint

BORDO™ 6000KA ALARMINGLY SECURE The BORDO™ Alarm 6000KA offers good theft protection for bikes thanks to the alarm function and advanced locking cylinder. Equipped with a modern locking cylinder system, the XPlus, you get the first ABUS alarm folding lock with imoroved protection. The XPlus cylinder ensures that thieves have an even harder time with manipulation attempts such as picking. In addition, a loud alarm of up to 100 dB attracts attention in the event of an attempted theft. Thanks to the intelligent motion sensor technology, the bike lock can even distinguish between small vibrations and persistent theft attempts. The 3D Position Detection ensures that when the wheel is nudged briefly, for example by a football, only a short beep sounds at first. Stronger and longer lasting movement triggers the loud alarm sound. Want to be on the safe side? Then drive thieves to despair with the BORDO™ 6000KA! - 5 mm bars with durable, soft-touch coating to prevent damage to paintwork - The bars and body are made of specially hardened steel - Alarm at a volume of at least 100 dB for 20 seconds, followed by automatic reactivation - 3D position detection - detects vibrations and the smallest of movements in all three dimensions and triggers an alarm - Smart alarm – the lock emits small warning beep in the event of minor and brief vibrations, e.g. if a football bounces nearby - Acoustic signal indicates battery status and active status - Bars are connected by special drill resistant rivets - ABUS XPlus cylinder for the greatest protection against manipulation, e.g. picking - SH carrier included - Transport position allows for the lock to be folded for transport without activating the alarm. - Alarm position - insert locking bar completely; the alarm will be activated after locking - Speaker protected from attacks by locking bar

GRANIT™ XPLUS™ 540 PLAY IT SAFE! The highest level of security from the ABUS range: The GRANIT XPlus™ 540 U-Lock offers the best protection against theft for your bicycle Specially hardened steel, power cell technology for protection against impact and attempts to force open the lock, XPlus cylinder for the greatest protection against tampering: The GRANIT XPlus™ 540 U-Lock combines the highest-quality materials with the latest technology for protection against theft! It is a first-class lock which protects your bicycle when the risk of theft is high. Various quality seals demonstrate the value of the GRANIT XPlus™ 540 U-Lock: It is VdS approved and has received seals of approval from institutes in Russia, the Netherlands, Finland, Sweden, Denmark, Norway and the United Kingdom. - 33/64" hardened square shaft parabolic shackle - ABUS power cell technology offers the highest level of protection against impacts and attempts to break open the lock - The shackle, housing and the structural parts of the locking mechanism are made of specially hardened steel - ABUS XPlus cylinder for the highest level of protection against tampering, e.g. picking - Automatic keyhole cover to protect against dirt and corrosion

- 5.4mm hardened steel links for high security lock ups - Features a 360 degree rotating lock head - Durable rubber coating on steel links protects the bike frame - Includes new click tight bracket for effortless, quiet and reliable transport - Includes 2 keys - Key safe program - Eligible for the anti-theft protection offer - E-Bike approved - Lifetime Warranty

BORDO™ 6000K FOCUS ON SECURITY, HANDLING AND FLEXIBILITY Place your trust in the quality of a classic model: The BORDO™ 6000K folding lock offers good theft protection in an easy to use package. The BORDO 6000K Folding Lock features six 5 mm steel bars connected with special drill resistant rivets, which fold together into an easy to transport package. This is familiar territory for ABUS – the locks in the ABUS Bordo family have gained a reputation as true classics whose functionality has nevertheless yet to be surpassed. This is a variant that can be opened by one key. Made of specially hardened steel, the bars and housing offer high resistance. At the same time, the high-quality ABUS XPlus cylinder provides particularly high protection, e.g. against picking. The soft coating provides protection against paint scratches. It also makes the lock easy to grip. The "Made in Germany" quality has garnered international awards. - 5 mm bars with extra-soft yet resistant coating to prevent damage to paintwork - The bars and lock body are made of specially hardened steel - Bars are connected by special drill resistant rivets - ABUS XPlus cylinder for extremely high protection against manipulation, e.g. picking - SH holder incl.

GRANIT™ XPLUS™ 540 PLAY IT SAFE! The highest level of security from the ABUS range: The GRANIT XPlus™ 540 U-Lock offers the best protection against theft for your bicycle Specially hardened steel, power cell technology for protection against impact and attempts to force open the lock, XPlus cylinder for the greatest protection against tampering: The GRANIT XPlus™ 540 U-Lock combines the highest-quality materials with the latest technology for protection against theft! It is a first-class lock which protects your bicycle when the risk of theft is high. Various quality seals demonstrate the value of the GRANIT XPlus™ 540 U-Lock: It is VdS approved and has received seals of approval from institutes in Russia, the Netherlands, Finland, Sweden, Denmark, Norway and the United Kingdom. - 33/64" hardened square shaft parabolic shackle - ABUS power cell technology offers the highest level of protection against impacts and attempts to break open the lock - The shackle, housing and the structural parts of the locking mechanism are made of specially hardened steel - ABUS XPlus cylinder for the highest level of protection against tampering, e.g. picking - Automatic keyhole cover to protect against dirt and corrosion

The high-quality XPlus cylinder on the Steel-O-Chain 9808K chain lock provides excellent protection against manipulation of the lock and thus against theft. No matter if someone tries to break into the bike lock or the XPlus cylinder with conventional tools, or even special ones – they won’t get very far. The built-in XPlus cylinder and the 8 millimetre specially hardened steel chain provide great theft protection. In order to protect the paintwork on the bike in the long run, the chain is covered with a textile sleeve. Even the keyhole has a cover to protect it from dirt and corrosion. Well secured, your bike can be parked with no worries. - 8 mm square chain. - The chain, housing and structural parts of the locking mechanism are made of specially hardened steel. - Automatic keyhole cover to prevent corrosion and the ingress of dirt. - ABUS XPlus cylinder for the greatest protection against manipulation such as picking. - Great protection for when there is a high risk of theft - Two keys included.

Kryptonite's New-U New York Fahgettaboudit Mini is simply the strongest lock money can buy. Its 10/10 security rating makes it the best choice for quick stops or overnight security in major metropolitan areas, college campuses...pretty much anywhere! Bike thieves can just Fahgettaboudit. Specifications & Features: - 18mm hardened MAX-PERFORMANCE STEEL SHACKLE - Patent-pending HARDENED DOUBLE DEADBOLT design gives additional protection against twist and cut attacks - Patented STEEL SLEEVE over cross bar for double security - HIGHEST SECURITY DISC-STYLE CYLINDER is pick and drill resistant - Sliding dustcover to PROTECT FROM DIRT AND DEBRIS 3 STAINLESS STEEL KEYS - including new design and one LED REPLACEABLE KEY FOB - Key Safe Program - Protective vinyl coating - Product dimensions: 3.25” x 6” (8.3cm x 15.3cm) - Product weight: 4.55 lbs (2.06 kgs)

Big cities call for big protection, and Kryptonite's New York Chain delivers with 12mm six-sided chain links made from hardened manganese steel. Wrap this burly lock around your frame worry-free thanks to the durable nylon cover that protects your bike's paint from scratches. Leave with peace of mind knowing the 14mm hardened Max-Performance steel shackle mated to the Evolution Series 4 Disc Lock is on duty. With a double deadbolt design to protect against twist attacks, would-be thieves don't stand a chance. It comes with three stainless steel keys--one of which is lighted for night access!

The New U, the U-Lock redesign from Kryptonite, features expanded double-deadbolt security, anti-rotation capability, and a fresh new design, all making life quite a bit harder for the bike thieves of the world. The New York Lock Standard LS is the perfect choice for bike security in major metropolitan areas and college campuses, and the long shackle design gives you more options when it comes to locking up your bike. Specifications & Features: - 9/10 security rating - 16mm hardened MAX-PERFORMANCE STEEL SHACKLE - Patent-pending HARDENED DOUBLE DEADBOLT design gives additional protection against twist and cut attacks - HIGHEST SECURITY DISC-STYLE CYLINDER is pick and drill resistant - Sliding dustcover to PROTECT FROM DIRT AND DEBRIS - 3 STAINLESS STEEL KEYS - including new design and one LED REPLACEABLE KEY FOB - Key Safe Program - Protective vinyl coating - Product dimensions: 4" x 10.25" (10.2cm x 26cm) - Product weight: 4.85 lbs. (2.20 kgs)

The New U, the U-Lock redesign from Kryptonite, features expanded double-deadbolt security, anti-rotation capability, and a fresh new design, all making life quite a bit harder for the bike thieves of the world. The New York Lock Standard is the perfect choice for bike security in major metropolitan areas and college campuses. Specifications and Features: - Security rating: 9/10 - 16mm hardened MAX-PERFORMANCE STEEL SHACKLE - Patent-pending HARDENED DOUBLE DEADBOLT design gives additional protection against twist and cut attacks - HIGHEST SECURITY DISC-STYLE CYLINDER is pick and drill resistant - Sliding dustcover to PROTECT FROM DIRT AND DEBRIS - 3 STAINLESS STEEL KEYS - including new design and one LED REPLACEABLE KEY FOB - Includes FLEXFRAME-U BRACKET providing convenient multi-location u-lock transport - Key Safe Program - Protective vinyl coating - Product dimensions: 4" x 8" (10.2cm x 20.3cm) - Product weight: 4.45 lbs (2.02 kgs)

The lock with the code you choose. You can lose a key, but not a numerical code you made up yourself. For all those who want to play it safe, we now offer the folding lock BORDO™ 6000C LED with opening code and light. Never be left in the dark again. The BORDO™ 6000C LED can be used to illuminate the combination set window. This way, you can unlock the bike lock at night if there is limited light. The BORDO™ 6000 has become a real classic over the years - the clever design has won friends all over the world with its high level of security, flexibility and compact size. The 5 mm bars connected with specially designed drill resistant rivets can be folded for easy transport. The BORDO™ 6000C LED adds another member to the BORDO™ 6000 family. The C in the product name indicates that this is a combo lock with code. The integrated LED light gives you enough light to see the set numbers even in the darkest locations. Is there need to worry that the numbers might wear off or fade over time? Not at all - the numbers are not printed. Instead, we produce the code dials from two durable components that guarantee long-term readability. - Updated design with easier to use combination set window. - 5mm bars with extra-soft two-component casing to prevent damage to paintwork - 2k digits won't fade - Link construction with special rivets allows compact folding - Flexible mounting with non-slip velcro straps or screws at the bottle holder device - SH bracket option allowing for an easy one hand operation and solid holding

BORDO™ 6000C LED THE CLASSIC BORDO WITH OPENING CODE AND LIGHT Never be left in the dark again. The BORDO™ 6000C LED can be used to illuminate the combination set window. This way, you can unlock the bike lock at night if there is limited light. The BORDO™ 6000 has become a real classic over the years - the clever design has won friends all over the world with its high level of security, flexibility and compact size. The 5 mm bars connected with specially designed drill resistant rivets can be folded for easy transport. The BORDO™ 6000C LED adds another member to the BORDO™ 6000 family. The C in the product name indicates that this is a combo lock with code. The integrated LED light gives you enough light to see the set numbers even in the darkest locations. Is there need to worry that the numbers might wear off or fade over time? Not at all - the numbers are not printed. Instead, we produce the code dials from two durable components that guarantee long-term readability. - 5 mm thick bars, extra-soft coating to prevent damage to paintwork - The bars and the housing are made of specially hardened steel - Bars are connected by special rivets - Integrated LED lamp for illuminating the code dials - A CR1220 button battery to power the LED lamp is included - Two-component code dials ensures long-lasting legibility - Opening code can be set individually

150cm-long, maximum-security, hardened-steel chain lock designed to secure multiple bikes at home, garage or office. Its 12mm hardened-steel shackle and 10mm hardened-steel chain will keep your bike safe, while the toughened-nylon sleeve help prevent frame scratch. HOMIE comes with three coded replaceable keys and a handy wall hook for easy storage when not in use. HOMIE is approved to maximum Gold Sold Secure standard and was rated best chain lock by Cycling Plus.

Kryptonite's New York Cinch Ring Chain is a 12mm, six-sided link chain made of triple heat-treated, manganese steel giving it maximum strength. The chain includes a special larger cinch ring design for maximum usable length, lighter weight and less bulk than full length chains. It secures with Kryptonite's Evolution Series 4 Disc Lock that boasts a 14mm hardened steel shackle for top-notch security. Three keys are also included, with one featuring a high-intensity LED bulb for convenient, easy unlocking in the dark. This New York Cinch Ring Chain has an anti-theft protection offer.

Compact and lightweight, ABUS' high-security Granit Plus 640 U-Lock is capable of locking around reinforced parking meters. The 640 features a 12mm special hardened-steel round shackle that retains its flexibly to offer great protection again crowbar attacks. The upgraded locking mechanism bolts 4 times into the lock body (2 times per shackle side) to provide excellent protection against twisting/torsion/cutting attacks, while still offering great feel and comfort when locking. - Excellent corrosion resistance - Shackle double bolts in lock body - Shackle, case and supporting elements of the locking mechanism are made of special hardened steel - Very intensive use of special weight-optimized alloy and light materials - Soft-touch coating feels good in the hand and protects paint job from damage - ABUS Plus cylinder offers high protection against picking - ABUS Code Card provided for easy key replacement, re-ordering - Mechanism Type: Key - Diameter: 12 mm - Shackle Shape: Round - Shackle Height: 230 mm - Shackle Width Inner: 8.3 cm - 2 keys are supplied with the lock - 1 LED-lighted key are supplied with the lock

GRANIT™ PLUS 470 MAXIMUM PROTECTION AGAINST A WIDE VARIETY OF BIKE THEFT TECHNIQUES Stop thieves in their tracks: the GRANIT™ Plus 470 U-Lock offers superb protection against attempts to remove the lock by hitting or pulling. Do you need to leave your high-value bicycle in locations such as railway stations where the risk of theft is high? Then the GRANIT™ Plus 470 U-Lock is your ideal companion: the ABUS Power Cell technology offers superlative protection against attempts to remove the lock by hitting or pulling. The shackle, the body and the load-bearing parts of the locking mechanism are manufactured from specially hardened steel. It also features the picking-resistant Plus disc cylinder. This combination has earned the GRANIT™ Plus 470 acclaim in a wide variety of tests, with seals of approval from OSIMZ (Russia) and test institutes in Finland, Sweden, Denmark, Norway and the United Kingdom. - Hardened 15/32" parabolic shackle - ABUS Power Cell technology provides outstanding protection against attempts to remove the lock by hitting or pulling - The shackle, the body and the load-bearing parts of the locking mechanism are manufactured from specially hardened steel - Automatic cover to protect the keyhole from contamination and corrosion

ABUS' U-locks offer strength, durability and protection you can count on. The Granit X-Plus 54 Mini U-Lock boasts a tough and conveniently sized 13-mm thick, 5.5-inch long parabolic steel shackle and an impressively tough lock body to keep your bike safe and sound. The double bolted ABUS X-Plus lock cylinder is highly tamper resistant, and it's a snap to carry the Granit X-Plus 54 on your bike with the included bracket. This lock comes with two keys, one of which features an LED light while the keyhole features an automatic cover to protect the lock against dirt and corrosion.