High pressure spot and projection welding operations may utilize forces over 2000 lbs and Tuffaloy high pressure holders and electrodes are designed to withstand these high forces. High pressure electrodes have flat bottoms which eliminates electrodes jamming that can occur with standard tapered holders. Another advantage is that the electrodes and holder heights are always the same, as contrasted to tapered electrodes which can be forced into the sockets to varying distances. Tuffaloy’s High Pressure Welding System uses a threaded coupling to hold the flange mounted electrodes and are available for use with platen mounted systems as well as straight holders for spot welding arm mounts.