IRWIN VISE-GRIP Straight Jaw Pliers are ideal for flat, square, and hex work by providing maximum surface contact with hardened teeth that are specially designed for gripping. Constructed of high-grade, heat-treated alloy steel for maximum toughness and durability, these pliers have a hex key adjusting screw to vary pressure and draw materials together. The 1-15/64 in. jaw length and 5/8 in. jaw width and maximum 1-7/8” jaw capacity make it easy to grip onto nuts and bolts. This plier also features a nickel plated finish that protects against corrosion.