Features:-[Wide Application]: suitable for workpieces with hardness less than 65HRC, such as stainless steel, aluminum plate, carbon steel, thin iron, insulation board, pvc board, wood board, etc.-[Performance]: it has a one-piece design, which makes the chips generated during the chamfering process more convenient and does not delay the working efficiency due to tool blockage.-[Grinding function]: the blade can be grinded, and the more convenient maintenance method allows the tool to be grounded without unloading.-[Ease of Use]: the automatic through hole chamfering cutter can quickly trim and chamfer both sides of the hole in seconds.-[High-speed steel]: excellent material, capable of processing a variety of hard metals, and improved blades double the service life of the tool. Specifications:Product Name: Countersunk Drill Type: 3 Flute 90 Degree Titanium Plating Size: 6.3/8.3/10.4/12.4/16.5/20.5mm Length: 61mm Color: Gold Material: HSSInty: 1PCCome Includes:1 Pc. Countersunk DrillNote:1. The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.