The THEX836 is a "T-HEX" maximum security chain 5 ft in length with hardened 8mm hexagon shaped links and integrated lock. Hexagon shaped case hardened trip heat treated super chain. The THEX836 is ideal for securing motorcycles, bicycles, ATVs, watercraft, ladders, construction equipment, trailers and much, much more. Best when used with a TRIMAX premium U-Lock or with a TRIMAX ultra strength padlock.