The base is formed by bolt welding using the same welding machine. The welding time varies between 10 and 100 ms and a ceramic ring is not used. Shielding of the molten weld is not absolutely necessary although the use of shielding gas does give a nicer welding result in some situations.
The rod almost has the same form as with capacitor discharge, but the rod tip is not used. The welding base has a slightly conical shape which allows the rod to be forced more evenly into the weld. Available in copper-plated steel and stainless steel.