Countersink with 3 cutting edges, 90° chamfer angle, maximum diameter of 10.40 mm, total length of 50 mm, head length of 7.8 mm, and 6 mm polygon shank. Complies with DIN 335 C standard for creating a conical seat for ISO metric countersunk screws with a minimum drill diameter of 2.50 mm. Made of HSS, coated with standard TiAlN, suitable for machining free-cutting, mild carbon steel, steel alloys, and tool steel. Also suitable for gray, malleable, ductile, and compacted graphite cast iron, cast aluminum, as well as copper and copper alloys.