Used to Countersink holes for the heads of screws in woods and plastic. The 2-Flute integral design ensures uniform and concentric results each and every time. High performance carbide tips with aluminum titanium nitride (Altin) coating provide chip free hole edges and lasts longer than uncoated carbide Tipped and much longer than steel countersinks, #55202XL, (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, 55202XL High performance carbide Tipped Altin coated 82 degree Countersink #6 screw 3/8 dia x 1/8 drill DIA x 5/16 round shank