IRWIN Tools VISE-GRIP Locking C-Clamps, Fast Release, Regular Tip, 6-inch (17T) Fast Release is twice easier to open, has a no-trigger release, and offers one hand operation. Adjust pressure and work fit with turn screw that stays adjusted for repetitive use. Wide-opening jaws provide greater versatility in clamping a variety of shapes. Constructed of high-grade heat-treated alloy steel for maximum toughness and durability. Rubberized soft-grip handles reduce hand fatigue.