A high security chain for your bike ebike or motorbike. Features 12mm six sided chain links made of 3t hardened manganese steel for maximum strength cinch loop for effective lock ups using less chain offers nearly the same ldquoin userdquo length as a traditional 5.5 chain which means less bulk to carry durable protective nylon cover with hook n loop fasteners to hold in place includes evolution series 4 disc lock with 14mm max performance steel shackle higher security disc style cylinder with reinforced anti drill anti pull protection system patented oval hardened steel crossbar for extra security hardened double deadbolt locking for extensive holding power sliding dustcover protects and extends cylinder life 3 stainless steel keys ndash one lighted with high intensity bulb and replaceable battery key safe program product dimensions 130cm chain length x 14mm shackle diameter product weight 4.79 kgs patent d564339