5 PCS 3/8″ 4 FLUTE CARBIDE END MILL – REGULAR LENGTH – TiALN COATED USA
Coating: AlTiN has a high aluminum content and excellent heat resistance, hardness, and oxidation resistance. HRC 45 degrees: Hard alloy milling tools are good at working on carbon steel (~HB225), alloy steel (HB225~325), pre hardened steel (up to HRC45), hardened steel (HRC40~45), and cast iron.