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 -- We 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 (6pcs right)