Easy retro-fit strap buttons. Secure locking mechanism. 3 Different FinishesDimensions: 50 x 23mm (Each) Weight: 27g (Each). Pair of replacement guitar strap buttons which have a spring loaded locking mechanism allowing easy removal and re-attachment of the strap with added security for the instrument. There are a choice of finishes- including Chrome- Black and Gold effect.. guitar strap locks