Bicycle mountain motorcycle motorbike chain lock 5-digit resettable mixture anti-theft with out key1.5-digit bicycle lock: Factory atmosphere is 00000. Very safe as there are 100,000 possible combinations. Personal password can be reset.2. Inner thickness: 6mm thick hardened metal chain. Resistant to cuts and saws. ABS material lock cylinder protecting cover, demanding to deform and crack.3. Weight: about 580g/piece, 90cm long. Long adequate to forestall motorcycle theft. This is long adequate to wrap bikes and frames, or lock a number of motorcycles together.4. Durable mixture lock: smooth, rust-proof, durable, and proof against violent damage. The use of polyester protective cover can not solely effectively protect the chain, but also prevent chopping and sawing.