... bushing,locking blocks, die casting part, mould components,precision mould parts,standard and customized punches,precision die components,die core,die inserts Feature Material ... ,inner-aperture grinder,Sodick EDM, CNC grinding machine,CNC milling machine,polishing machine, engine lathe,Projector (imported from Japan),wire EDM machine AdvantageAccuracy: Inside diameter can becontrolled ...