45-303-5 TiN Coated 2-Flute Double End Mill .5" x 4"TiN Coated 2 Flute Double End Mill Solid carbide provides better rigidity than high speed steel. It is extremely heat resistant and used for high speed applications on cast iron, nonferrous materials, plastics and other tough to machine materials. Titanium Nitride (TiN) is a multi purpose coating which increases chip flow in softer materials. The heat and hardness resistance allows the tool to run at higher speeds than uncoated tools. Center Cutting