Beware:
on my Gibson L7, then end peg was just a friction fit.
The D’Addario strap lock Secured the guitar strap to the peg, so the strap couldn’t rotate around the peg.
This resulted in the strap applying torque to the peg as I was putting it over my head.
and twisted the peg out of guitar 
[no contact with floor 
]
Rather than tap or glue the peg back in, I put a loop of nylon cordage to a wooden toggle I had put inside the guitar. Looks yooglie, but I know it won’t come off (strap changing becomes not quick though)
Suppose I could put a toggle on the outside too, rather than lashing the loop to the guitar strap.