Locking C-Clamp, 6 In. C-Clamp with Swivel Pads, Capacity 2-1/8 In., Throat Depth 1-1/2 In., Screw Mechanism Easy Release Trigger, Micro-adjustment, Nickel Plated, Alloy steel, For Welding Sheet Metal or Woodwork, 6 In. Size for Working with Smaller Pieces or for Holding Materials in Tight Spaces, 18 In. Size for Clamping Around Large Objects Automotive Applications, Government Specifications GGG-W-00649, Includes Swivel Pads WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov - Nickel (Metallic)