Easy to install: Comes with screws, washers and nuts for easy mounting. And the tuned guitar string does not loosen . Wide usage: Universal size tuners fits for almost all acoustic guitars and electric guitars. You can tune guitar strings fast and accurately. High quality material : With Metal construction, the tuning pegs are anti-rust, anti-corrosion, high performance of stability and durability. Accurately: Enclosed type tuning pegs, with these tuning pegs, you can tune guitar strings fast and accurately. Value for money. Product name: Guitar Tuning Pegs Scope of application: Guitar universal, Electric or Acoustic Guitar. Features: - fully enclosed design- tuning fast- fixed pitch- not in tune- long service life- wear-resistant and durable- anti-corrosion and anti-rust- easy and and convenient to install-the tuned guitar string does not loosen - blend with your beloved guitar size: 10.59 x 4.39 x 4.19 cm Material: Metal colour: Silver Package Contents: 3 x Left guitar machine heads 3 x Right guitar machine heads 6 x nuts 6 x washers 6 x screws 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.