Irwin Vise-Grip 5" Curved Jaw Locking Pliers with Wire Cutter are made of alloy steel with a nickel finish for maximum toughness and durability. They have a jaw opening size of 1-1/8 inch, a jaw length of 7/8 inch, and a jaw width of 3/8 inch. The pliers also have a plain-grip steel handle and a wire cutter. They are for automotive and industrial applications. The curved jaw puts tremendous pressure on four points for any application that requires maximum torque. The classic trigger release provides maximum locking force. 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 and provides a controlled release.