FENDER STRAP BLOCKS – FLEXIBLE STRAP LOCKS
099-0819-006

Pack of 4.
Put your strap on the guitar, slide these over to help stop your guitar strap falling off.

more info:
The most reliable and hassle-free instrument strap lock system ever devised. No need to remove or replace existing strap buttons on your guitar; just slip easily installed Strap Blocks over the existing strap buttons and that’s it – you’re ready to go, with your strap locked securely in place.
Strap Blocks work with most OEM strap buttons, and are available in convenient four-packs.