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).