... pins, guide bushings,piercing punches,ejector sleeves, die inserts,carbide pins,sprue bushing,locking blocks, die casting part ... and customized punches,precision die components,die core,die inserts Feature Material: Copper, high speed steel, carbon steel ... pressure tungsten steel → linear cutting → punch a hole →finish turning(FT) → polishin Processed andTesting Equipments Center-less grinder, surface ...