The 712 Integrated Chain features an end-link locking point for extensive holding power and 7mm four-sided chain links made from 3T manganese steel. Rated at a 5 / 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 hardened deadbolt design provides extra holding power and the disc-style cylinder is both pick and drill resistant. The lock comes with two new ergonomic "I" keys and a weather-resistant nylon sleeve to prevent scratches. The lock is 120 cm long and weighs 3.75 lbs.