Note: The size of the mold on the glass side must be the same size as the edge of the glass. If it is too or small, the glass will be crushed.Desktop pressure meter back cover device, this cover device can meet the needs of general watch repairers, watch lovers and other watch lovers Instructions:1. a press machine larger than the surface cover (the outer ring of the glass surface), and install it on the lower panel of the pliers;2. Choose a press slightly smaller than the back cover of the meter and install it on the upper mouth of the capping machine;3. Place the cover face down, put it on the press at the lower mouth, and place the back cover in a proper position;4. Rotate and unscrew the watch capping machine.5. Put the watch cloth on the watch when pressing the watch, so as to protect your beloved watch Capping machine mold specifications:Round mold: (50/48 46/44 42/40 38/36 34/33 32/31 30/28 26/24 23/21 20/18 16 round mold 20/25 round flat mold)Square mold: (45 40 35 30 25 20)Colour:BlackMaterial:Metal + ABSSize:15x10cmPackage Contents:1 * Capping machine18 * AccessoriesOnly 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.