Watch glass fitting machine with 14 nylon dies for watch repair. The dies are used to press the watch backs and watch glass crystals that are typically too difficult to press by hand. The nylon dies snap easily onto the tool. The nylon die inside assortment consists of 36mm, 32mm, 30mm, 28mm, 24mm, 20mm, and 18mm sizes. In addition are seven flat nylon dies to fit inside.