Model "B" large ball point screw connectionElectrode can be used to within 1 in of the Shortstub's® headBuilt to last with a proven high-impact, high-heat separate and easy-to-install replacement headDesigned to improve productivity with a quick and easy installation of electrodes, eliminating total replacementCenterfire consumable series contact tips, gas diffusers, nozzles, and tapered contact tips are machined to the highest quality for extended service life