This C.H. Hanson clamp is built to last a lifetime. It is made from high-grade alloy steel for maximum toughness & durability. This clamp has a nickel-plated finish, which resists rust & corrosion. The clamp features a traditional release lever, which allows the clamp to be released even at a high pressure. The traditional adjustment screw allows the clamp to fit to various sizes & pressures. This Locking Chain Clamp can hold & lock around any shape, & has a chain span of 46cm (18 inches). Meets all ASME product specifications.