IRWIN VISE-GRIP Original Locking C-Clamp with Swivel Pads, 18", 22 8"-wide jaw opening provide greater versatility in clamping a variety of shapes Swivel pads hold tapered work, awkward fabricating jobs, and delicate projects without damaging the work surface Turn screw adjusts pressure to fit work and stays adjusted for repetitive use Constructed of high-grade heat-treated alloy steel for durability Classic trigger release designed to provide maximum locking force 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 8-inch jaw capacity