This item is a guitar lock, made of copper material, durable. The gloss brings a sense of fashion to the guitar. It can your instrument from accidental loosening of the belt. The mushroom has a lock to ensure safe locking and not easy to fall off. Easy to install and use. Just fix it the belt, and then firmly install the screw to the locked position of the instrument. Suitable for electric bass and electric guitar. Feature - Each guitar requires 2 locks. Great accessory for electric guitars and bass. - copper material, with luster, ensures firm use and beautiful appearance. - your instrument from accidental loosening of the belt. - Mushroom belt lock, suitable for electric guitars and acoustic guitars. - Comes with mounting screws and washers, easy to install. - Easy to install and use. Just fix it the belt, and then firmly install the screw to the locked position of the instrument. Specifications - Screw: about 20 x 3mm - Material: Copper - Color: silver - Button outer diameter: about 16 mm - Button inner diameter: about 4. 5 mm - Button height: mm - Color: silver. Package list: 8 x Strap button 2 x Screws 2 x Washers