... : copper(best),brass(better),iron(good )all have American Style Electrode Holder 1. supply kinds of welding ... holders 2. mateial : copper(best),brass(better),iron(good )all ... have3. 300A ,500A ,600A ,800A all have4. packing : one piece into ... .5*34*23.5 American Style easy to hold Electrode Holder M300A