Desktop Watch Capping Machine Maintenance Tool For Watch Repair And Battery Replacement With 12 Molds 1. Material: The main body is made of engineering plastics, and the connecting rod is made of metal 2. Scope of application: household, watch repair 3. Find a press with an inner diameter slightly larger than the surface mirror in the press matched with the press, and install it on the lower screw (the two sides of the press are of different sizes, and you can use it as long as it is suitable) 4. Find another press with an inner diameter slightly smaller than the back cover and install it on the upper screw 5. After installing the press, place the watch mirror down and the back cover up and lay it flat. After checking, press it down with proper force (there is a notch on the back cover that should be aligned with the lever, otherwise it may be possible. Break the handlebar) 6. 12 mold sizes: 1820 2123 2426 2830 3132 33343638 4042 4345 4850 mm 7. Size: 22x13 cm 8. Weight: 550g 9. Note: The gland should be slightly larger than the crystal, otherwise it will crush the crystal. If the back cover is transparent, the inner diameter of the upper gland should be slightly smaller than the diameter of the back cover but larger than the back cover glass