Features: Easy Installation -- Set of 6pcs handed guitar machine heads easy to install compatible with most electric guitar or acoustic guitar. Premium Quality -- Chrome finish durable zinc alloy material quality sealed tuning pegs great replacement for your old broken tuners. Application -- Gear ratio: 1:15 with heavy duty internal gear fit 13/32 inch(10mm) standard machine heads hole. Ergonomic Design -- Special oval sunken 6 in line Guitar string tuning pegs for comfortable stable use. Various Combo Available -- provide 3 color for choose( Silver Gold Black) and also provide 3 Right +3 Left 6 Right 6 Left 3 different combo for your DIY. Specifications: Material: Zinc Alloy + Iron Color: Black / Gold / Silver (Optional) Combo: 3R+3L / 6R / 6L (Optional) Application: Packing List: 6 * Guitar Machine Heads (3pcs left + 3pcs right)