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, making it perfect for any application that requires maximum torque|Constructed of high-grade heat-treated alloy steel for maximum toughness and durability