Tapered End Mills (H.S.S.) - 20, 25 & 30 Degree Per Side Tip Dia.: 1/8", LOC: 1/2", Shank: 1/2", OAL: 2-1/2", 30 Degree High Speed Steel Tip Diameter: 1/8" Flute Length: 1/2" Shank Diameter: 1/2" Overall Length: 2-5/8"