Dual Unlock Options: Choose between keyless convenience with a 4-digit combination lock or use the included 2 keys for secure access.
High Security: The 4-digit combination offers 10,000 possible codes, making it nearly impossible to crack. Heavy-duty alloy steel ensures extra anti-theft protection.
Durable & Scratch-Resistant: Covered with a protective cloth sleeve to prevent wear and scratches, while the rust-proof and cut-resistant build enhances durability.
Long & Versatile: At 3.2 feet (96cm), the lock can secure two or more bikes, or be used for gates, fences, motorcycles, and more.
Strong & Reliable: Built with zinc alloy lock cylinder, hardened steel material, and ABS plastic for strength and resilience.
– Two unlock ways: 1.Keyless convenience, turn the digital wheel flexibly;2.Also lock with 2 keys
– Protective cloth sleeve prevents wear and is durable.
– The 4-digit combination created 10,000 possible codes making it nearly impossible to crack.
– Heavy duty anti theft components: alloy steel chain lock, zinc alloy lock cylinder, ABS shell.
– 960mm length which is enough to lock two or more bicycles, Motorcycle, Scooter, Door, Gate, Fence, Grill and etc.
Precise Scientific Design
The digital shaft rotates smoothly, without any wrong password settings and shaft failures. Solid zinc alloy cylinder with strong lock plug allows you to have peace of mind knowing your bike is locked and secure.
The 4-digit combination allows up to 10,000 possible codes making it nearly impossible to crack. Keyless convenience!
Wide Application
The bicycle chain length 3.2 feet/ 96cm and weighs 0.93lb/420g.
ROCKBROS Bike Locks prefect for motorcycles, bikes, e-bikes, gates, fence, and even lawn mowers, ladders, sports equipment etc.
4-Digit Combination Lock
The bike chain lock is resettable for 10,000 sets of passwords combination for the lock and the original password is”0000”.
Hardened Steel Material
Hardened steel is smelted through multiple procedures and is not easy to break.
Thicker Bike Lock
The diameter of this bike chain lock is up to about 17.19mm, which is strong enough to provide an anti-theft performance
Protective Cloth Sleeve
Soft cloth cover, anti-scratch and wear-resistant, protect the chain and prevent scratching the bike frame, durable.
1.Set the combination 0000 to unlock
2.Rotate the Reset knob 90 degree right
3.Trun the dials to set your own code
4.Rotate the Reset knob 90 degree left





























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