Item Type: Watch Press Tool Material: Metal, ABS Package List 1 x Watch Press Tool 12 x Dies 1Professional Repair Set: Watch press set comes with a press tool, 12 fitting ties, and a watch opener to open the buckle back cover, you can purchase this kit to complete the watch battery replacement. 212 Fitting Dies: Includes 50/48 mm, 46/44 mm, 42/40 mm, 38/36 mm, 34/33 mm, 32/31 mm, 30/28 mm, 26/24 mm, 23/21 mm, 20/18 mm and two special molds. It is easy to find the right die to complete the installation. 3Simple Operation: First, choose the lower die, you need to choose a larger die than the crystall; Then, choose the upper die, choose a slightly smaller die than the back cover; Last, install the die, put the clean cloth on the lower die, put the watch on it, and then close the back cover with the appropriate force press tool. 4Material: Machine is made of high hardness aluminum, equipped with thick spring, lever principle design, easy to press installation. The 12 molds are made of ABS material and can avoid scratching the back cover. 5Efficient and Practical: The watch back case press set is more accurately, efficiently and reliably, a versatile tool for watch repairs. It can also be given as a gift to a friend.