5/8 in, Length of Cut 9/16 in, Overall Length 2-5/16 in, Trade Number SJ-6, Included Angle 60 Degrees , Abrading Application Acute Angle Milling, Chamfering and Countersinking, Metalworking, Coating Bright (Uncoated).Carbide Bur,Cone,5/8 In,1/4 Shank 1/4 in, Head Dia.