Vise-Grip, 10CR, 10" Curved Jaw Locking Pliers, Grips & Torques Multiple Surface Shapes, Including Round Pipes, Square Or Hex Bolts & More, 3 Times More Gripping Power, Self-Engineering Lower Jaw Pivot Allows Jaw To Align On Workpiece For Maximum Grip Without Slipping Or Stripping, Provides Maximum Torque Or Grip Without Requiring Heavy Input Pressure, Jaw Mechanism Grips Tighter As More Torque Is Applied To The Tool, Built Strong, High Grade Alloy Steel Is Heat Treated For Maximum Toughness & Durability, Hex Key Adjusting Screw Tightens To Draw Material Closer Together For Tighter Grip, Loosens To Provide Controlled Release, Guarded Release Provides Easy Jaw Opening.