Solid Carbide Spiral Router Bits / End Mills for Steel, Stainless Steel & Non Ferrous Metal with AlTiN Coating (Aluminum Titanium Nitride coating)
designed for working in Metal working Steel Cold roll, soft steels,
gummy stainless 303, Tool steels, exotics like titanium, inconel,
17-4PH stainless etc. Entire gambit of "steel".