●Fits Ukulele or Small Electric Guitar, Acoustic Guitar or Bass ●Steel construction for durability and stability ●Height: 0.4 inches (9 mm), Upper Outer Diameter: 0.4 inches (10 mm), Mounting Screw Hole Diameter: 0.1 inches (3.3 mm), Please check the size image before purchasing ●Easy to install and convenient to use ●Package includes: 2 pcs strap buttons, cushion, mounting screws