Professional equipment for welding 400A welding electrode holder pure copper material is used around the nozzle, which has good electrical conductivity and low resistance. The handle is made of high performance material for heavy duty applications. It has a great feel and grip space. 300-500A universal, it is easy and convenient to use and it has high conductivity and improved cable connection. This electrode holder allows quick and easy replacement of electrodes. Professional equipment for welding: Ideal replacement for worn electrode holders Twist Lock electrode holder with all connections needed to connect directly to your welding cable High temperature resistance, strong and durable adhesion for long-term use This electrode holder allows for quick and easy replacement of welding cables. electrodes