CNC Chasis single piece without weldingCompact designSpecially designed contacts without joint (fixed and moving) with silver plating to ensure sturdiness, negligible millivolt dropSpecially designed handle and contact blades to perform better during short circuitPrevent malfunctioning under short circuitDual guide to ensure larger lifeOptional auxiliary contacts for interlockEasily repairable at siteAll CNC mfg. to ensure quality consistency