With the addition of a new guitar in the family, I wanted to feel safe knowing that my brand new guitar won't be falling when I pick it up or while I play! I did not want pull out the strap buttons and just screw in a new pair with the locking mechanism. Since that would cause some wear and tear, I'll be it not much, but I'm picky like that so what can you do!
I bought this going "Hey at this price point, even if they're useless I'll be fine" Well... blew me away. Ever since I'm using this my guitar strap won't come off unless I cut it with knife or something. Because it's round like that and fits so snug, it prevents the guitar strap(using a leather one btw) from bending at all from it's weight. So the guitar strap just sits there without it bending at all and there's no way it will ever come off unless you maybe get 2 guys to tug on it.
Brilliant little product from Fender, hat's down!
I recommend this as an alternative to anybody not wanting to screw in new strap lock. Brilliant product!