Key-Free flexible locking solution. The 912 Combo Integrated Chain features an end-link locking point for extensive holding power and four-sided, 3T manganese steel chain links. Rated at a 6 / 10 on our security scale, it is good for quick stops in a metropolitan area, a few hours in the suburbs or overnight in rural areas. The 5-digit resettable combination has over 100,000 code possibilities and is protected by our Combo Safe Program. The lock also features a patent pending lock head design. The chain is 120 cm and weighs 7.35 lbs.