This ch hanson clamp is built to last a lifetime it is made from high grade alloy steel for maximum toughness and durability this clamp has a nickel plated finish which resists rust and 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 and pressures the shape of this 150mm 6 inch locking c clamp allows reaching into places where ordinary clamps cannot be