Fast release TM 2x easier to open, has a no pinch release, and offers more finger room. Curved jaw puts tremendous pressure on four points of any style nut or bolt head. The no-slip Pro-Touch TM grip provide comfort and leverage while reducing vibrations and hand fatigue. Ideal for tightening, clamping twisting and turning. Turn screw to adjust pressure and fit work.Stays adjusted for repetitive use. Constructed of high grade heat treated alloy steel for maximum toughness and durability. Hardened teeth are designed to grip from any angle.