Specifications: 6.3mm, 8.3mm 10.4mm, 12.4mm, 16.5mm, 20.5mm; Material: HSS 4241 Drill heads in universal sizes are compatible with common cordless screwdrivers and drills, including drill presses The 90° countersink set of 6 pieces with 3 cutting edges is suitable for machining on metallic and non-metallic materials, such as carbon steel, steel plate, iron, aluminum, insulation, PVC, board wood (soft, hard), plastic etc. Millings with titanium coating are very sharp and are characterized by high concentricity and durability. With these high-quality burrs, burrs are broken and removed without scratching. Specification: Technical data: three cutting edges. Angle: 90 degrees. Material: 4241 high speed steel (for 25HRC hardness, the following parts, such as carbon steel, thin iron plate, insulation board, PVC board, wood, etc.). Advantages: 1. Batch processing: the taper cutter is a batch processing environment for the beveling tool; 2. The one-piece design: the chips produced in the process can be chamfered more easily, the case, the ergonomics of the tool will not hinder lags; 3. The knife can grind: convenient way to protect unnecessary tool can be uninstalled en masse; 4 in one simple step: automatic through-hole chamfering, beveled edges of both surfaces can be quickly drilled in seconds; Excellent 5. Material: all kinds of processing can be flexible or black metal, improve the blade, so that the service life is twice as long. Size: 6.3MM: 6.3MM*5MM*37MM 8.3MM: 8.3MM*6MM*40MM 10.4MM: 10, 4MM*6MM*39MM12.4MM:12.4MM*8MM*46MM16.5MM:16.5MM*10MM*47MM20.5 MM: 20.5MM*10MM*47MM Note: Due to the difference between different monitors, the picture may reflect the actual color of the item. Please consider this before purchasing. Scope of delivery: 1 x milling set