5 Pc Pro Steel High-Precision HSS Countersink Set, 90 Deg, TiAlN Coated, 6.3 mm to 20.5 mm

High-precision countersink No. 150132. All countersinks also have 3 drive flats on the shank for use in a 3-jaw chuck. All countersinks have 3 cutting edges. Special geometry with extremely unequal spacing and matching cutting edge preparation. Radially relief ground. Flutes ground from solid. Newly developed special TiAlN coating for long service life. High-precision countersink, produced with tight manufacturing tolerances similar to DIN 335-C. Advantage: Very smooth cutting throughout the entire countersinking operation. Chatter-free running for perfect results and optimum tool service life. Application: High-precision countersinks for production of precise, round 90 Deg countersunk surfaces. Content: 1 pc. each countersink: Sizes 6.3, 10.4, 12.4, 16.5, 20.5 Supplied with: 5-piece precision countersink set in a round box. Shank: Three clamping flats to h9 Number of cutting edges Z: 3