Corded Drills, Drivers -3-Flute 90 HSS Countersink Chamfer Cutter End Mill 10.4mm Natural Highlights Generic Brand 3-Flute 90 HSS Countersink Chamfer Cutter End Mill 10.4mm Natural Description: Made of High Speed Steel ( 6542), strong and durable. Titanium coated surface, not easy to rust, solid and long service life. Universal 90 degree 3-edge countersink compatible with all kinds of drill bits, drills, including vertical drills and other common countersinks. 6 sizes, 2 types to meet your different needs: 20.5mm, 16.5mm, 12.4mm, 10.4mm, 8.3mm, 6.3mm (top milling diameter). Ideal for making countersunk holes, DIY daily use, easy to operate and effective for burr-free drilling. Suitable for processing metal and some non-metal materials, such as carbon steel, steel, thin iron plate, insulation board, PVC board, aluminum, soft and hard wood, plastic, etc Specification: Material: HSS (6542) High Speed Steel Shape: 3 flutes Edge: 90 degree Top Diameter: 20.5mm-0.8'', 16.5mm-0.65'', 12.4mm-0 ,48'', 10.4mm-0.4'', 8.3mm-0.32'', 6.3mm-0.25'' Bottom Diameter: 10mm-0.39'', 10mm-0.39'', 8mm-0.31'', 6mm-0.24'', 6mm-0.24'', 5mm-0.2'' Total length: 63mm to 2.5in, 60mm to 2.4in, 56mm to 2.2in, 50mm to 1.97in, 50mm to 1.97in 45mm to 1.77in Color: as shown image Package Includes: 1 Piece Countersink Drill Bit Note: Please allow 1-3mm error due to manual measurement, Make sure you do not mind before you bid Due to the difference between different monitors , the picture may not reflect the actual color of the item, please understand, thank you