The IRWIN VISE-GRIP Original Locking Welding Clamp features U-shaped jaws for enhanced visibility and more room to work. Constructed of high-grade heat-treated alloy steel for durability, this clamp is ideal for welding applications and holding awkward shapes in place with a turn screw that adjusts pressure to fit work and stay adjusted for repetitive use. Like all IRWIN VISE-GRIP locking tools, the clamps is designed with the classic trigger release to provide maximum locking force. Backed by the IRWIN Lifetime Guarantee.