The IRWIN VISE-GRIP avant-garde RR 7-inch Locking Pinch-Off Tool off and locks onto tubing, leaving both hands available to do different work. Simply its screw to adjust pressure and fit work. It adjusted for insistent use. The pinch-off tool is of finest, heat-treated alloy steel for top toughness and durability and features a classical trigger release designed to provide top locking force.