Features: Upgrade your classical guitar with precisions engineered 1:15 gear ratio tuning pegs featuring chrome plated metal construction and ABS knobs for smooth, accurate tuning. These open gear machine head boast a 6mm shaft diameter, 30.1mm total length, and durable internal mechanisms designed to maintain stable pitch without slippage. Ideal for luthiers, guitar technicians, and musicians seeking reliable replacement parts for worn or outdated classical guitar hardware. Perfect for maintaining professional grade instruments during studio recordings, live performances, or routine for home guitar maintenance. Each set includes six matching classical guitar tuners, ensuring seamless installation as direct replacements for most traditional nylon string guitars. Specifications: Materials: Metal+ABS Size: Approx. 1.18x1.18x0.98inch(3x3x2.5cm) Package Includes: 6x Metal Tuning Pegs 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.