2" x 2" depth TIALN COATED HSS Annular Cutter,Cutter 2" x 2" depth TIALN COATED HSS Annular, This coating works by forming a thin surface layer of Alumina ( AL203), or Aluminum Oxide ceramic,TIALN COATED: Titanium Aluminum Nitride ( TIALN) is a thin film coating that was developed from Titanium Nitride, department store Fantastic Wholesale Prices Fast (7-Day) Free Shipping Free Same Day Shipping With Every Order! Annular Cutter 2" x 2" depth TIALN COATED HSS.