Easy To Use: One: To select the lower mold, you need to choose a mold that is larger than the crystal but smaller than the dial. Two: Choose the mold above: choose a mold slightly smaller than the back cover. Three: Install the mold, just use the proper force to install it. More Professional: Each mold is marked with the mold size to easier to choose the right mold. The die is made of eco-friendly PE material, which will not scratch the watch glass. The lever theorem is used to save your effort when you use it. More : The watch press tool is made of high strength metal, which is strong and and has a long service life. Each product we will go through quality testing to that each tool is not easily damaged and can be used for a long time. Surprise Gift: Watch press tool set comes with a professional watch case pry knife. The precision watch case opener knife is made of high quality metal with a fine tip edge, allowing you to pry open the back cover of your watch more easily. Colour: black Material: metal, PE Package Contents: 1 x Watch case pressing 12 x Mould 1 x watch case opener Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.