Vise-Grip RR 7-Inch Locking Pinch-Off Tool IRWIN VISE-GRIP pinch-off tool pinches off and locks onto tubing, leaving both hands free to do other work IRWIN pinch-off tool uses a classic trigger release designed to provide maximum locking force 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 1/4-inch jaw capacity Made of high grade alloy steels Adjusting screw gives exacting pressure Guarded release helps keep work fast and safe Powerful locking mechanism Full lifetime warranty