... accuracy of c straight collets 0.01mm ,0.015mm 2.Made of special material steel we supply all kinds of machine tool ... supply the competitive price and good serve , The type of C straight collet: 4,5,6,8,10,12,14,15 ... -120M12JM7132280M28C42-140M14JM7132300M30C42-160M16JM7132320M32Collet chuck,tool holders,chuck,collet,pull studs,machine tools,ER collet,mill chucks,clamping nuts,wrench spanner,retention ...