3 Left 3 Right String Tuning Keys Fully Enclosed Knob Zinc Alloy Machine Head Tuners for Acoustic Electric Guitar Black1Quantity and Function: This kit includes 6 pieces guitar string tuning keys, 3 left and 3 right, mainly used to fix guitar strings and improve the sound quality of the strings. 2Zinc Alloy Material: These guitar string tuning pegs are made of excellent zinc alloy, which has good corrosion resistance and oxidation resistance, and a long service life. 3Fully Enclosed Knob: These guitar string tuning pegs use fully enclosed knobs to ensure convenient tuning and fixed pitch, providing you with a better playing experience. 4Replacement Parts: These machine head tuning pegs are suitable for most acoustic guitars and electric guitars, which can directly replace old or damaged guitar accessories. 5Easy Installation: Equipped with screw bushings, washers, and screws, these guitar string tuners are easy to install and replace, ideal for professional musicians or beginners.