2pcs VNMG160408 CBN-4 VNMG332 Cubic Boron NitrideCarbide Inserts Composite coating  for high Speed Finishing of Titanium alloy Quenched steel Double Side •    Inserts are made of  CBN particels which provide excellent wear resistance. •    Inserts are suitable for all high hardness process conditions whatever continuous or intermittent high-speed machining quechend steel,tool steel,high-speed steel,bearing steel,carburizing steel,spring steel and ductile iron. •    Double sided coated, multiple blades available, suitable for precision machining •    Perfect surface finishes because of low affinity to iron. •    Package:1 box includes 2pcs CBN inserts