YaeTek Professional 13 Piece Watch Press Set - Watch Back Press - Watch Back Case Closer Included 12 Dies with Metal Insersts New Watch Press Set Back Case Closer Crystal Glass Fitting Watch Repair Tool Cast Iron press;It is made of cast metal to ensure strength; It comes with an assortment of 12 dies to allow for 24,26,28,30,31,32,33,34,36,38,40&42.43&45,48&50 These exclusive straight wall nylon dies will not scratch or mar crystals; Great for snap on watches. Snap-on system allows dies to snap on and off quickly;