【Suitable for different watch covers】- Watch back case opener is used for watch cases with grooves；watch case opening pry is used for the watch case with a pry opening；Screwdriver is used for watch case fixed by screws；tweezer is used to remove the battery.The use range of the watch back case opener is 15-55mm, and the drill bit spacing is set by rolling the adjusting wheel to fit the groove of your watch back.

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