Packaging contents: you will receive 12 guitar straps buttons. Assess your daily use. They can work perfectly with your guitar strap. button measures 2.3x1.2 cm. Durable material: made up of high quality zinc alloy, which is strong, not easy to break and no need to worry about corrosion. Sustainable, long long lifespan. Innovative design: design in the shape of a mushroom and polished silver surface create an elegant appearance. With soft locks in high quality rubber, in order to better protect your guitar and your buttons and prevent scratches. Easy to install: Each guitar needs two strap locks, easy to install and use. You just have to insert the strap button into the screw, make sure the pin is tight, then use the button to lock the webbing. Large application: well designed for most types of guitars, suitable for acoustic guitars, classic guitars, electric guitars, bass and ukulele.