Description: 400A C-Ground Clamp for Welders Max Jaw Opening: 1.57 Inches / 40mm. Pure Copper Design: This welder clamp is made of total pure copper, offer it excellent clamping and better electrical conductivity. Can be apply to stick welding, submerged arc welding, gas metal arc welding and gas tungsten arc welding. The C-Clamp with large contact area features a copper design to resist welding splatter and is perfect for welding set-up chores as well. Specification: Material: brass Maximum effective spacing 40mm Allowable conductivity value 600A Net weight 850g Package Includes: 1 piece G ground welding earth clamp