- This set contains only 18 pins, so it is the best item as a master key for all your watches. However, when you have a lot of winding watches in stock, there is always a problem with the key. Se this key is the solution for you. Most of the keys for winding watches are in these 18 teeth. Starting from 000 to 15 sizes. All these wrenches are made of BRASS and come in a plastic box as shown in the photo.
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