The Abus Tresor Combo Chain Lock is built to keep sticky fingered individuals from walking off with your bike. With 10mm thick, hardened steel chain links, it provides protection against most hand tools. It's not impervious to power tools, so it's still best to leave your bike in a high traffic area, so as not to give thieves a peaceful location to practice their skills. The links are wrapped in a fabric sleeve to protect the paint job on your ride. And to ensure that you don't have to worry about lost keys, the four digit combination pad is responsible for keeping your bike where you left it. The Abus Tresor Combo Chain Lock is available in one size, and in the color Black.