Regular, also known as medium spiral bits, are used in general purpose applications. They are used on soft, nonferrous materials.
Spiral flutes are constructed of a higher flute angle to remove chips easier.
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.
Multilayer Titanium Aluminum Nitride (TiAlN) is a blended coating that is more efficientthan TIN. It offers a high level of wear resistance at higher cutting speeds and used on high alloy steels and cast iron.
Spiral flute reamers are used in blind and through-hole operations. They are used to bridge interrupted cuts.