C.H. Hanson's locking pliers and clamps offer maximum strength and gripping capacity, making them ideal for general purpose use. Constructed of high-grade, heat-treated alloy steel with a nickel pate finish for maximum strength, toughness, and durability. These quality pliers and clamps meet all ASME product specifications. Lock on instantly with a vise grip and milled jaw that creates a powerful locking mechanism with very secure grip. Guarded trigger provides quick release while also helping prevent accidental release..