1. Before using this tool to close the watch back cover, you must choose the most suitable dies. 2. It is better to pad a cleaning cloth under the watch for protection while closing the watch back cover. 3. Place the watch on the bottom die and make sure it is in the correct position before closing the watch back cover. 4.
https://www.amazon.com/Zacro-Closer-Watchmaker-Repair-Fitting/dp/B073PW85HS

