This is a flex cable for locking up a bike. The cable is double looped and is 15 feet or 480cm long and 3/8 inch or 10mm thick. It is compatible for use with padlocks, disc locks and u-locks which makes it very versatile. It has looped ends which can be threaded through a lock once the main part of the cable has been wrapped around the bike and whatever it is being locked to. It has a braided steel cable which is covered in protective vinyl which not only protects it from being cut but also makes it soft when you are handling it and it will not scratch your bike or the item that you are attaching it to.