My three sons and I are hard on watches that range from Casio to Seiko, Tag and Rolex.  With construction projects, sports events, etc, we replace pins regularly. This product looked like a great opportunity to have pins on hand rather than buying them per watch crash.
We tried them once, the first two came apart before we could get them into the watch, the next wouldn't fit, and when we did get two to fit, one broke the next day.
Probably worth what we paid for them, just a poor decision.  I would recommend buying fewer, higher quality pins.