Features: Brand new and high quality This tool is only suitable for cutting and sharpening 0.040 tungsten needle size. This tungsten electrode sharpener is mainly used for welding fine small product such as jewelry industry. There are also seven angles, each with two holes, which are distributed in different positions: 7(14)° 10(20)° 15(30)° 20(40)° 22.5(45)° 25(50)° 30(60)° Precise control enables grinding tools to provide more perfect tungsten tip angle according to your needs. Suitable for most rotary tools with 3/4-12 threads.Your rotary tool needs a 3/4-12 thread with an outer diameter of about 0.71 inch (or 18mm). Tighten the chuck on the shaft, and the height h should be less than 1-5/8 inches (or 34mm). All holes are designed to use the same height as diamond wheels. Simple and open design, the grinding wheel plane can easily and accurately aligns with the grinding position. You don't need to set the height again and again. Installation is very simple. This grinder kits is equipped with a small bone for cutting tip, five grinding wheels and two upgraded mandrels, which has good hardness, wear resistance and impact resistance. The product is made of upgraded aluminum alloy material, which is more durable and reliable. Specifications: Material:Aluminium Size:Approx.5x25mm/0.19x0.98inch Outside diameter of thread: 0.71inch (18mm) Package Includes: 1 Set Welding Electrode Sharpener note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.