Telwin Earth Clamp is made of total pure copper and it will offer excellent clamping and better electrical conductivity. It can also be applied to stick welding, submerged arc welding, gas metal welding and 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.
• Heavy Duty Arc: 600A Rating C-style ground clamp is a premium quality for heavy duty arc.
• Max Jaw Opening: 1.53 Inches / 3.9 cm.
  
  

Specification:

- Material: Brass
- Maximum effective spacing: 39mm
- Allowable conductivity value: 500A