Irwin Vise-Grip 4" Curved Jaw Locking Pliers with Wire Cutter is made of high grade alloy steel and heat treated for maximum toughness and durability. The hardened teeth are made to grip from any angle, and the curved jaw puts tremendous pressure on four points for any application that requires maximum torque. The classic trigger release provides maximum locking force, and the built-in wire cutter is great for a variety of applications and material shapes. The hex key adjusting screw tightens to adjust pressure and draw materials together, providing a controlled release.