OSG, 867-3750, Bur, Abrasive, Series: 867, Radius End, 3/8 in Diameter Head, 1-1/16 in Length of Cut, 6 in Overall Length, Cone Head Shape, Double Cut, 1/4 in Shank Diameter, Carbide Head, 14 deg Included Angle, 63000 rpm Maximum, Industry Specification: SL-3L6