Description: 1. Well-built, heavy-duty, sturdy, attractive, ergo-friendly, easy-to-handle, perfect little bike lock. Great for bicycles, skateboards, sports equipment, gates and fences, grills and lawnmowers, tools, tool boxes and ladders. 2. The overall length of the chain is about 36 inches, perfect for securing bicycle and compact enough to carry in a bicycle tote bag, and you can wrap it around the seat post. 3. Convenience combination code instead of having to deal with keys, especially if you don't have any pockets. It uses a simple five character password that is very secure. 4. Black nylon cover over the chain is thick and will not rip under normal use. The cloth cover keeps the chain from scratching the bicycle frame or pinching your leg. 5. The chain lock default pass code is 00000. To set a new 5-digit combination, you open the lock then turn the inner dial 1/4 turn, set a new combination, then turn the inner dial back upright which sets the new combination code. Specification: Name: Anti-theft password chain lock Size: chain diameter 5.7cm, circumference: 110cm Weight: about 700g Color: black and red Material: The chain is made of alloy steel, the code lock body is made of alloy lock core, and the code wheel is made of environmentally friendly ABS engineering plastic. Features: environmentally friendly, strong strength, strong lock, wear-resistant, not easy to age Package List: 1 x Bike Lock