IRWIN VISE-GRIP Original Large Jaw Locking Pliers, 12", 12L3 Heavy-duty jaws that grip around work of all shapes are ideal for plumbers, mechanics, welders, and anyone working with large objects Ideal for tightening, clamping, twisting, and turning Turn screw adjusts pressure to fit work and stays adjusted for repetitive use Constructed of high-grade heat-treated alloy steel for durability Classic trigger release designed to provide maximum locking force