Mainly constructed of steel material, anti-rust, high performance of stability and durability. Complete set with 3 left and 3 right machine heads and other fixing accessories, easy to install. Tuning fast and accurately, difficult to be out of tune. Exquisite looks with perfect workmanship and high-technology, good-looking, very easily matched for your guitar and also have good decoration effect. perfect replacement parts for your folk/electric guitar. Type: 3R 3L Suit for: Folk/Electric Guitar Colour: silver Material: A3 steel Package Contents: 6 * guitar knob 6 * iron master bushing 12 * screws Only the above package content, other products are not included. Note: Light shooting 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. Product Notes: Please allow a little manual errors.Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please confirm acceptance before ordering. About Shipping: Please ensure your shipping informations are correct to avoid delivery issues. All orders are shipped within 3 days after payment. Delivery usually takes 8–12 days, The specific delivery time is depend on circumstances. If you have any questions during your purchase, feel free to contact us. We will respond you within 24 hours.