A little story to back these lock's integrity.  I installed them on a Korean made Washburn WG-587v.  Incredible guitar after tweaking.  I did a guitar spin at a show and the guitar went flying.  The strap lock was still on the strap and locked into the holder.  The screw had ripped out of the horn of the guitar!  The screw tore through about a half inch of solid wood (and I epoxy all my screws in) before the strap lock broke.  Amazing.