String Instruments Accessories - brand name - 20 Pieces/Pack Bass Guitar Ukulele Round Strap Locks Knobs with Washers Screws Highlights brand 20 Pieces/Pack Bass Guitar Ukulele Round Strap Locks Knobs with Washers Screws Description: 100% brand new high quality Easy to install, easy to use Suitable for Acoustic Electric Guitar Bass Ukulele To prevent electric guitar basses from falling off, easy to use Material: metal specification: Screw length: approx. 22mm / 0.87 inch Button W x H: Approx. 12x8mm / 0.47x0.31inch Package Includes: 20pcs Strap Lock Buttons with Ring Screws Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item Due to Due to manual measurement, there may be 1-2mm error in the size