First off, this tool is next to useless for Seiko-style L-link bands. Admittedly, I unscrewed the pin and handle and used it to push up the Seiko links, but ruined the original pin and two replacements because they are so weak.

Second, there are no instructions whatsoever. Googling replacement of watchband links by brand shows that there are tons of different ways that watchbands work, and I can see that this is quite useful for some brands, just not bands that don't have link pin holes on the ends of the links. The Seiko band I bought it to use on uses an entirely different system.