Combination Bike Lock: The 4-digit resettable combination lock mechanism is easy and fast to operate, with about 10,000 code combinations, not easy to crack, never worry about losing your keys or forgetting your keys. The unique 360° rotating lock design is easy to view and lock and unlock. (Initial password 0000). Heavy Duty Anti-Theft: This bike lock is made of zinc alloy lock cylinder + alloy steel lock body, 6 thickened steel chains ensure the bike security is indestructible. Prevent thieves from snatching and running away. Multi-Purpose: The folding bike lock is 33.5 inches long and can lock road bikes, mountain bikes, motorcycles, folding bikes, scooters or other bikes. The ABS wrapped lock is smooth to the touch and will not scratch the paint of the bike. Compact Folding Lock: The lock can be folded for storage, saving more space in the frame, and comes with a storage bracket, which can be fixed to the bike with screws or two hook and loop straps. If you have any questions or problems with use, please let us know and we will help you find out and solve it.