Features: Locking tuners prevent the gear from being exposed to air and reduce the rust, which is more durable. Comes with screws, bushings and ferrules for easy mounting. The tuned guitar string does not loosen easily. With these tuning pegs, you can tune guitar strings fast and accurately. High quality internal gear, it is effective to prevent screw slippage. Suitable for acoustic and electric guitars of normal size. Specifications: Condition: 100% Brand New Material: Copper-zinc Alloy Optional Type: Black 6R, Black 3L3R, Silver 6R, Silver 3L3R Weight: Approx. 175g / 6.2oz Ferrule Outer Diameter: 1.4cm / 0.6in Suitable for 1cm / 0.4in diameter hole Package list: 6 * Guitar Tuning Peg 6 * Ferrule 6 * Bushing 6 * Screw