Description workmanship and testing are good. Materials: Durable hard acrylic, ABS and steel. Anti-rust, anti-corrosion, stable performance and high durability. Set includes 6 Guitar Tuning Pegs (3R+3L) for Acoustic Electric Guitar, Tuner Guitar Parts These guitar tuning pegs are an ideal replacement for old, broken tuning pegs and fit nearly all acoustic and electric guitars Instructions Simply put the string through the hole, tighten the locking thumbwheel, and adjust the strings (please note that the locking thumbwheel cannot be pulled out completely). Keep your guitar in tune and easy to tune. These handpieces are perfect for your repair work. Stable sound can be easily installed for new, and can be adjusted tightly to make your guitar sound stable, perfect for you Universal Size Guitar Tuning Nailhead Tuner for Electric or Acoustic Guitars.Made of zinc alloy metal, 6pcs (3pcs left + 3pcs right).3 tuners per side. Includes mounting screws. Handpiece (3L + 3R) machine headMaterial: machine head, zinc alloy Color: Silver Package Included: 6 * Tuner Heads (Left 3pcs + Right 3pcs) Note: 1. Please allow a little error due to manual measurement. Please make sure you don't mind before bidding. 2. Colors may vary due to different monitors, please understand. Hello, please pay attention to your delivery address when purchasing products. If your receiving information (such as: name, street, house number, doorbell/email without name, etc. is wrong, the order will not be delivered correctly.) Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.