... .reduce friction Increased using life mould parts with high quality core holder 1.core holder material:s45c+brass2 ... elements: Straight side interlocks, X-style Straight slide interlocks, Square interlock,Tapered interlocks, Taper pin sets . Ejector devices: ... plug baffles ,Threadless pressure plugs, Jiffy Connectors, Pipe plugs,Heat pipe others : Mold Counterviews,Sprue bushing, Locating ring ...