electrode holders 1>electric current:300A/500A/600A 2>Jaw material:Iron/brass/copper 3>heavy-duty,shock-proof 4>high craft electrode holders Japan Type 500A Electrode holders1>Jaw:Brass forging jaw,Brass casting,Iron with copper coating2>300A/500A/600A for you choose3>External touch body with comfortable glass fibre or nylon handle,good insulation property,heavy-duty, shock-proof and heat- ...