Vise-Grip T9DR Locking C-Clamps IRWIN locking clamp has wide-opening jaws for greater versatility in clamping a variety of shapes Locking clamp uses a turn screw to adjust pressure and fit work; stays adjusted for repetitive use Locking clamp is constructed of heat-treated alloy steel for maximum toughness and durability Classic trigger release designed to provide maximum locking force 7-1/2-inch jaw capacity 9" 4 1/2" jaw opening, 4 3/4" throat depth Wide opening jaws provide greater versatility in clamping a wide variety of shapes Jaws flex, requiring less adjustment Adjusting screw for changing jaw opening and pressure Guarded release for quick openings and repositioning