Artempo Guitar Strap Buttons for Electric and Acoustic Guitar and Bass - Pack of 2 Made of high quality zinc alloy, makes the strap button to be as tough as possible. The strap locks with an anti-slip mechanism to protect the instruments well. Used as multi-purpose for electric, acoustic guitar and bass. Designed with a quick release guitar strap button, just need to pull out the button to discharge. Easy to install and works well with most of guitar brands.