Used to Countersink holes for the heads of screws in woods, plastic and non-ferrous materials. The 2-Flute integral design ensures uniform and concentric results each and every time. Carbide tips provide chip free hole edges and lasts much longer than steel countersinks. Available in a wide variety of sizes, Complete with the HSS M2 fully ground drill bit, #55202, (A°) angle 49°, (B) Cutting Height 1/2, (D) Diameter 3/8, (D) shank 5/16, overall length (L) 2-9/16, wood screw size #6, D1 1/8, replacement drill 630-102, L1 1-5/8, 55202 carbide Tipped 82 degree Countersink #6 screw 3/8 dia x 1/8 drill DIA x 5/16 round shank