VISE GRIP® The Original™ Curved Jaw Locking Plier, 7 in, Opens to 1 1 2 in ORS NASCO or burn and has a or burn and has a high tensile strength Contains pressure sensitive thermosetting rubber resin adhesive which performs as Class B temperature (266ºF 130ºC) Provides hear stable insulation for hot spot applications Hardened and tempered Malleable handles with heavy duty enamel finish Accurately machined jaws and adjustment nut with no slipping or stripping Provides maximum torque without requiring heavy input pressure jaw mechanism naturally grips tighter as more torque is applied to the tool Classic trigger release provides maximum locking force Curved jaw puts tremendous pressure on four points of any style nut or bolt head Self energizing lower jaw provides 3X more gripping power than traditional locking pliers