The Irwin Quick-Grip 1 inch C-Clamp combines professional-grade construction with a small size, making it an ideal choice for handling delicate clamping tasks with precision. It has tough, double-rolled threads that offer fast clamping pressure adjustments and give the tool a long service life. Holds up to 900 pounds of clamping pressure with the cast iron Irwin 1 inch C-clamp, its swivel pad maintains stable contact with the pieces being clamped and tilts to match angled surfaces.