Case Press with Nylon Dies. This is a new watch case press. These nylon dies will not scratch or mar crystal. It comes with an assortment of 12 dies (six double sided hollow and six flat). Snap-on system allows dies to snap on and off quickly. Can be tightened to stay in position - great for holding down glued parts. Don't destroy watch cases or case backs by using the wrong tool. Our Combo Closer will give you years of satisfaction and service. This case press can press most major brands of press type watch backs.