VISE GRIP® The Original™ Curved Jaw Locking Plier, 7 in, Opens to 1 1 2 in ORS NASCO Made from Noryl® Made from Noryl® PVC injection molded footwear is 100% waterproof to ensure workers' feet are dry and comfortable PVC formulation is resistant to degradation from agricultural chemicals Self energizing lower jaw provides 3X more gripping power than traditional locking pliers 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