1GUITAR ACCESSORIES: GD139 is perfectly crafted sunflower guitar knobs with no burrs or incisive edges, central hole diameter is approximately 6.8mm, suitable for most electric guitars 2METAL MATERIAL: Electric guitar knob is made of excellent quality, full metal construction without any plastic components, ensuring a smooth adjustment experience 3VERSATILE USAGE: Top hat knobs are designed for adjusting volume, tone, and pitch, allowing players to customize their electric guitar sound based on their preferences or needs 4EASY INSTALLATION: Come in a pack of 3 electric guitar dome knobs with a small wrench included, making it convenient for guitarists to replace and install the knobs 5UNIVERSAL COMPATIBILITY: Metal potentiometer knobs is compatible with a wide range of electric guitars, offering a reliable and long lasting option for adjusting sound parameters 3 x Electric Guitar Knobs 1 x Wrench