47-701-8 TiAIN Coated Roughing End Mill .625" x 2.75"TiAIN Coated Roughing End Mill Cobalt is harder than high speed steel and provides better wear resistance. It is commonly used on high tensile alloys. Titanium Aluminum Nitride (TiAlN) has a higher hardness and oxidation temperature versus TiN and TiCN. As a result, it is particularly advantageous for higher speed operations in a variety of steel machining applications. Best for heavy cuts, cerntercutting for plunge cuts, deep slotting & pocketing