IRWIN Tools VISE-GRIP Fast Release Locking C-Clamp, Regular Tips, 11-inch (19T) IRWIN VISE-GRIP clamp uses Fast Release that is easy to open with a no-trigger release and 1-hand operation C-clamp has wide-opening jaws to provide greater versatility in clamping a variety of shapes Turn screw on the clamp to adjust pressure and fit work; stays adjusted for repetitive use 11-inch size 3-3/8-inch jaw capacity Fast Release is 2x easier to open, has a no-pinch release and offers more finger room Wide-opening jaws provide greater versatility in clamping a variety of shapes 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