Cobra Carbide 24000 Micro Grain Solid Carbide Regular Length General End Mill, Uncoated (Bright) Finish, 2 Flute, 30 Degrees Helix, Square End, 4mm Cutting Length, 1.0mm Cutting Diameter, 38mm Length (Pack of 1) Solid carbide tools offer long tool life and faster cutting speeds than other substrates, but are more brittle and must be used with rigid toolholding systems Uncoated tools feature just the base substrate without any additional treatment or coatings and are suitable for a wide range of applications Round shanks allow use with a wide variety of toolholding systems Center cutting geometry Design for increased chip removal rate