Don’t hassle with complicated strap locks ever again. These Strap Locks are the most reliable and instrument strap lock system you will ever Just our easily installed Strap Locks over your existing strap buttons and your strap will be locked securely in place. Features - ColorAssorted Color - Material: Silicone. - Size: Approx. 2.5 * 2.5 * 0.29cm/ 1 * 1 * 0.11 inch (L*W*H). - Work with most strap buttons. Easy install. - Easily over existing strap buttons. No need to remove or replace existing strap buttons on your guitar. - Lock your strap in seconds. Nothing mechanical to break or wear out. Don’t need to buy a special connector for each strap. - Keeping your strap secure while still letting the strap move freely with no binding. Package list: 8 * Premium Strap Locks Anti Guitar Strap Blocks with Lock Button (2*White + 2*Blue + 2*Red * 2*Black)