Collets and collet bodies hold and position the tungsten electrode in a TIG torch body. The 1.6mm collet bodies in this pack of three are for use with the Dinse Type 35––50 Air Cooled TIG Welding Torch, 4m (Stock No. 70087) and the TIG Welding Torch for All Draper Inverter/Welders (Stock No. 57096).