【Safer Way to Protect Your Bike】- 5-digit resettable combination bike lock chain, much safer than other 4 digit locks. Easy to set your own personalized number combination. Password design saves you from the hassle of carrying keys. 5 feet (1.5 meter) long with 15 millimeter outside diameter (includes vinyl coating), which is enough for you to lock your bike to a tree/gate/fence/railing/etc.