GUHRING 9042610063500 Carbide End Mill, Vari Helix, Dia. 1/4 In. More details: Carbide End Mill, Grade DK4460UF, List Number 4261, Ball Nose End Mill Style, Dimension Type Fractional Inch, Milling Dia. 1/4 In., Number of Flutes 4, Length of Cut 3/4 In., Center Cutting Type, Overall Length 2-1/2 In., Finish nano-A, Shank Dia. 1/4 In., Cutting Direction Right Hand, Helix Angle 36/38 Degrees , Corner Radius 0, End Mill Application Finishing