Features: waterproof This cable and hose products are non-toxic, odorless harmless PVC materials, compliance with EU environmental standards and testing requirements. Plastic shell made of high quality ABS material, no cracking at low temperatures at 40 degrees Celsius environment without deformation. Durable, super anti-cut, trustworthy; with abrasive resistance copper keys, easier to use. Function: suitable for use with a fixed object lock together for your bicycle safety, to avoid the car thieves easily removed from parking spaces. So this is a very solid, very useful bike locks.