Feature: --Durable mold: ABS plastic mold with metal screws in the middle, very durable and will not leave scratches or marks on the watch. --Risk-free: The easy-to-use press tool helps to open or close the watch crystal and die without any pinching of your hands and the watch itself. --Durable material: The press tool is made of metal structure, and all kinds of discs are made of hard and durable plastic, which can be used for a long time. --Effortless Spring: The press arm is spring loaded to hold the press in the open position. The spring is good and doesn't require much pressure to close. --The gland should be slightly larger than the mirror, otherwise the mirror will be crushed. 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 glass of the back cover. Operation steps for regular cover-type watches: 1. Find a press with an inner diameter slightly larger than the watch mirror in the press that matches the press, and install it on the lower screw (the two sides of the press are of different sizes, as long as it is suitable, you can use it). 2. Then find a press with an inner diameter slightly smaller than the back cover and install it on the upper screw. 3. After installing the press, put the watch mirror down and the back cover up and put it flat. After checking, press it down with an appropriate force (there is a notch on the back cover that must be aligned with the handle, otherwise it may break the handle). Description: Name: Watch Press Tool Kit Scope of application: household, watch maintenance, watch battery replacement Material: The main body is made of engineering plastics, and the connecting rod is made of metal Packing list: 1 x Watch Press Tool 12 x Dies Note: Due to manual measurement, please allow 1-3 cm error, thank you. Due to screen and other objective reasons, there may be a certain color difference, please understand.