Solid CBN Inserts Solid PCBN Inserts for cast iron,alloy,bearing steel,hardened steel turning and milling.RNGN120400 RNMN120400 RNMN250700 RNGN150700 RNGN190700 SNGN120408 CNGN120408 CNGN120412 TNMN1604 RCGX0907 RCMX1207 WNGN0804 and other shapes CBN inserts.