Usage Tips:1DURABLE CONSTRUCTION: The tungsten electrode sharpener is made from premium alloy, offering high damage and wear resistance. With a smooth, durable black matte surface, this tool is designed by professional welders. 2MULTIPLE ANGLES AND OFFSETS: Offers 45, 40, 30, and 20 grinding angle options. 22.5, 20, 15, and 10 offsets available for customized electrode sharpening. Allows for precise sharpening based on specific welding requirements. 3VERSATILE HOLE SIXES: Designed with 4 hole sizes, 0.04in, 1/16in, 3/32in, and 1/8in (1mm, 1.6mm, 2.4mm, 3.2mm), the guide rails ensure concentricity and various sizes offsets, enhancing the utilization of the grinding wheel. 4CNC PRECISION DESIGN: The precise CNC machining design minimizes the consumption of the grinding disc, and ensures precise grinding angles and pointed edges. 5STRONG COMPATIBILITY: This welding tungsten grinder set is fit for most rotating tools with 3/412 threads. Ideal for sharpening electrodes used in various welding applications.