Tools For Milling Name Standard Specification Taper 1:50 Pin Reamers Matric ¦µ2-¦µ16 Machine Reamers With Parallel Shank Matric ¦µ2-¦µ20   BS Standard 1/8 - 1/2 End Mills With Parallel Shanks Matric ¦µ3-¦µ20   BS Standard 1/8 - 1/2 End Mills With Morse Taper Shank Matric ¦µ14-¦µ45