Chicago-Latrobe Countersink, Single End, Series: 209SF, 1/2 in Body Diameter, 2 in Overall Length, Straight Shank, 1/4 in Shank Diameter, 1 Flute, Right Hand Cutting Direction, Included Angle 90 Degrees, Centerline Angle 45 Degrees, HSS, Vapor Oxide Coated