Designed for electric guitars, these metal tone indicator rings offer practical way for managing your guitar's settings. The rings are easy to install and provide a clear visual reference for your knob positions. This helps you maintain consistent tone and volume Features -Color:Silver -Material:Iron -Size:2.10X1.40X0.30cm/0.83X0.55X0.12in - Hole diameter: 9.7mm - Iron material: crafted from sturdy metal, ensuring longevity and a pleasant tactile experience -Versatile function: ideal for adjusting both tone and volume, offers practical utility for guitarists -Easy to install: compatible with a wide range of guitars, making installation quick and simple -Precise adjustments: includes scale indicator washers for accurate tone and volume control -Distinctive: iron marker plate provide a unique and look for your guitar Package list: 10 x Guitar Knob Indicator Parts