Features: Precisions tuned guitar gears ensures accurate string adjustments and long lasting durability with a gear ratio for smooth tuning, crafted from iron to withstand frequent use. The hexagonal open hole design provides secure screw grip and effortlessly installation, while vibrant color add a decorative touch to classical guitar aesthetic. Ideal for musicians, luthiers, or hobbyists seeking reliable upgrades for worn out tuning pegs or custom instrument customization projects. Enhancing tuning stability during performances, studio recordings, or routine maintenances with these corrosion resistant machine head gears. Engineered with anti slip grooves and standardized sizing, this 6 piece set seamlessly integrates with most classical guitar shaft systems for professional grade functionality. Specifications: Material: Iron Type: 15 teeth or 18 teeth or 21 teeth Size: As Pictures Show Package Includes: 6x Guitar Tuning Gear note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color from the item.