This high quality waterproof watch case wrench can open almost all types of waterproof cases with 4 sets of pins (round, flat, square, and toothed; 12 pcs) which are easily removed and replaced.

This is a precision tool made for hard use and comes in plastic case that holds wrench and pins in a cardboard box.

It is made to open waterproof watch cases of all sizes and allows you to easily open waterproof watch case backs without marring or scratching the watch case itself. Replace watch batteries and movement with ease.