Irwin 225108 Quick Grip C-Clamp 8"Highlights: Capacity: 8" Load Limit: 1500 lbs Throat Depth: 4" Double rolled thread provides greater clamping pressure Large swivel pad reduces marring on work surface and increases stability Large handle for greater clamping pressure with less effort WARNING: Some Dust Created By Power Sanding Sawing Grinding Drilling And Other Construction Activities Contains Chemicals Known To The State Of California To Cause Cancer Birth Defects Or Other