I used to work in a high end retail shop and we had something similar. It works very quickly and simple, you just need to know which end of your pin, in the link is tapered, and that is the side the needs to come out first. Thrilled to finally have one at home especially for those inexpensive watches that I buy just to match an outfit or look - I'm embarrased to take those into a high end store to have a link taken out!