Carbide End Mill Grade C2 Micro Grain List Number 226 General Purpose End Style Ballnose End Single End Dimension Type Fractional Inch Diameter 5/16 In. Shank Dia 5/16 In. Length of Cut 1-1/8 In. Overall Length 3 In. Number of Flutes 4 Center Cutting Type Cutting Direction Right Hand Helix Angle 30 Degrees Finish TiAlN