The IRWIN® VISE-GRIP Original 9AC 9-inch Locking Panel Clamp provides quick clamping and alignment of auto body panels with a bottom jaw that slides in a straight-line motion. Just turn the screw to adjust pressure and fit work. The locking clamp stays adjusted for repetitive use. The high-grade, heat-treated alloy steel construction delivers maximum toughness and durability, while the clamp's classic trigger release is designed to provide maximum locking force.