DURABLE - Locking tuners prevent the gear from being exposed to air and reduce the rust, which is more durable. EASY MOUNTING - Guitar Tuners comes with screws, bushings and ferrules for easy mounting. NOT LOOSEN - The tuned guitar string does not loosen easily. TUNE GUITAR ACCURATELY - With these tuning pegs, you can tune guitar strings fast and accurately. PREVENT SCREW SLIPPAGE - High quality internal gear, it's effective to prevent screw slippage. 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 conventional size acoustic guitar and electric guitar. Condition: Weight:Approx. 168g / 5.9oz Tuning Peg Size:Approx. 4.3 * 3.8cm / 1.7 * 1.5in Ferrule Outer Diameter:1.4cm / 0.6in Suitable for 1cm / 0.4in diameter hole colour:gold Material:Metal + synthetic plastic Package Contents: 6 * Guitar Tuning Peg 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.