Capacity ranges from 1 Ton . to 20 Tons.Automatic double pawl braking system.Double cover protection.Light weight - robust construction.Low effort required to lift maximum load.Extra thick friction discs.Fully forged hooks - conform to - ISS - fitted with safety latches, as standard.Alloy Steel - Grade 80 - Load Chain.Zinc plated hand chain, as standard.Sealed bearings.Each Chain Block is proof tested to 50% overload.