Irwin Vise-Grip 7" Curved Jaw Locking Pliers, designed to grip and torque multiple surface shapes, including round pipes, square or hex bolts, and more. With 3 times more gripping power than traditional locking pliers, these pliers provide maximum torque or grip without requiring heavy input pressure. The self-engineering lower jaw pivot allows the jaw to align on the workpiece for maximum grip without slipping or stripping. The jaw mechanism grips tighter as more torque is applied to the tool. Built strong with high-grade alloy steel that is heat treated for maximum toughness and durability, these pliers are made to last. The hex key adjusting screw tightens to draw material closer together for tighter grip and loosens to provide controlled release. The guarded release provides easy jaw opening. ANSI approved and backed by a limited lifetime warranty, these locking pliers are a reliable choice for any professional or DIY enthusiast.