Set of 6 quality black machine heads for steel string (electric or acoustic) guitars (3R3L ) 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 not off key if you lock the screw post when tune the guitar properly. Quality sealed machine heads Auto Locking Tuners (Tuning Pegs) Heavy duty internal gear<br><br>Colour:black Material:Metal<br><br>Package Contents: 1 x Guitar machine Kit<br><br>Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.