UNHO Watch Case Press Presser Closer Repair Tool with 11 Dies These exclusive straight wall nylon dies will not scratch or mark crystals. It comes with an assortment of 11 dies to allow for all size watches. Face down configuration means the repair person sees the case back being closed. Snap-on system allows dies to snap on and off quickly. Dies Sizes: 14mm,16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm