Years ago when I started playing guitar I got some Schaller Security Straplocks for my Custom Strat. One day one of them failed me and almost sent my guitar hurling to the floor, thankfully I caught her in time. I switched to Dunlop Security Straplocks after that. I got a new ESP Eclipse a year ago that came with Schallers and didn't bother to switch em out. Today one of them came undone again and sent my guitar hurling to the floor. Again thankfully, when it comes to my guitars, I have good reflexes. The hex screw part that is supposed to secure the bit that locks onto the pin to the strap undoes itself after a certain while and everything comes lose. Bad design flaw Schaller. Shame on you. Just a little headsup. I don't do any crazy stunts or guitar flips. I just know that the Schallers on my ESP are getting replaced by Dunlops asap. Take care of your guitars. Cheers.