Product Description: Perfect for resizing metal belts. If you bring it to a watchmaker, you can easily adjust the metal band over and over again with the task that you pay for a fee. (Only the type that removes the pin) Recommended for those who need to pay maintenance, dont have time to go to a watch shop or want to repair as soon as possible. ·When the belt size changes in your body shape, it is easy to adjust if the size of the watch you purchased from mail order does not fit. Not only can you remove links, but you can also add them and install them. Recommended for self-maintenance with 5 replacement pins. ·This product is for use with metal bands with pin-out pins.