Features: Precision-tuned guitar gears ensure 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 a secure screw grip and effortless installation, while vibrant color adds a decorative touch to classical guitar aesthetics. Ideal for musicians, luthiers, or hobbyists seeking reliable upgrades for worn-out tuning pegs or custom instrument customization projects. Enhance tuning stability during performances, studio recordings, or routine maintenance 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 / 18 teeth / 21 teeth Size: As shown in pictures Package Includes: 6 x Guitar Tuning Gear Note: Please allow 1-2 cm errors due to manual measurement. Due to differences between monitor displays, the picture may not reflect the actual color of the item.