... 3.reduce friction Increased using life mould parts with high quality core holder 1.core holder material:s45c+brass2.has ... Slide retainters: Slide holding devices, Slide lock, 2 Latch lock units: Latch Lock,Parting lock set,lock plate, parting locks . ... Ejector devices: Two-stage ejector, Accelerated knock-outs,slide core units, Lifter . Ejector Series: Ejector pin, Ejector blades ,Shouldered ejector ...