Kottle Watch Press Set, Watch Back Case Closer, Cast Iron Press, Glass Fitting Press with 12 Dies Cast Iron Press. The watch press is made of cast iron, sturdy and durable. Protective. Smooth ABS Plastic press dies will not scratch or mark the watch. Dies snap on and off quickly and easily. Accessories Complete.Comes with 12 assorted dies allow for 50/48 46/44 42/40 38/36 34/33 32/31 30/28 26/24 23/21 20/18. Ideal watch press for closing snap back type watch-cases, installing crystals and bezel rings.