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