This tool is used for opening the watch back case, convenient to use and carry; Usage: adjust the two toe of the tool, and put on the bottom of the watch gaps, tighten the right place; Press the opener and open the watch case to the right direction; (It is better to put the watch in the above-mentioned wood bottom is enough), convenient and practical; This tool is only on the bottom of the rotary table back cover with card slot; If you want to open the bottom, please choose to pry knife tools.