Tungsten carbide indexable inserts for cast iron, steel, stainless steel or other materials. We ... to choose.CNMG, CCMT, TNMG, DNMG, CDMT, SNMG, SCMT, SPMV,WNMG, VNMG, VBMT,TPGN, TCMT, KNUX, APKT, L6,YNUX, RCMX, RNMG ... , K is for cast iron and non-ferrious materials... Tungsten carbide inserts