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