1/8 in, Head Dia. 1/4 in, Length of Cut 1/2 in, Overall Length 2 in, Trade Number SM-51, Included Angle 22 Degrees , Abrading Application Metalworking, Surface Milling, Narrow Contouring, Coating Bright (Uncoated), End Type Pointed End Carbide Bur,Pointed Cone,1/4,1/8 Shank.