Well, not exactly, since I bought them for a guitar I'm giving away, but I never tried these before ( always did it old school ) and was in doubt about how they work.
But guess what, it's simple. For those who don't know how it works, here goes:
- first, just pull the ball pin out and slide the "U" part from the strap pin button
- then, obviously, screw the strap pin button to the guitar
- now, remove the bolt and washer from the "u" piece and insert the piece into the strap holes from the inside of your strap
- insert the washer and the nut back, and before tightening it, choose wich direction you want the "u" piece facing ( I look up and found out that some people use it facing down (u) or up (n).
And that's it, just slide the "u" pieces onto the strap pins already in your guitar and just to be sure, give it a nudge on top of the ball pin, although it has a very good spring action.
About it's quality, they're sturdy, secure and the felt washers they come with are excellent, and that's why I'll be buying more of these for my own guitars.