Description This is a set of 6 quality machine heads for steel string (electric or acoustic) guitars (6L). Now you have no more worries as to how have to pack for the handling guitar, piano small knock a small touch button and let the strings out of tune! The guitar will not off key if you lock the screw post when tune the guitar properly. Features - Color: Shown in the pictures. - Material: Steel gear and plated. - Size: Approx. 3.5 * 3 * 1cm/ 1.4 * 1.2 * 0.8 inch (L*W*H). - Set of 6 quality machine heads for steel string (electric or acoustic) guitars (6L). - Now you have no more worries as to how have to pack for the handling guitar, piano small knock a small touch button and let the strings out of tune! - The guitar will not off key if you lock the screw post when tune the guitar properly. - Auto Locking Tuners (Tuning Pegs) Heavy duty internal gear. - Gear ratio: 18:1.Package List6 x Guitar machine head (6L) 6 x Ferrule 6 x Threaded bushing 6 x screw