Check the listing for details. Notched Speed Knobs Speed Volume Tone Control Knobs White 4Pcs. Condition: New. Listed at 10.99 USD. What is this?This guitar control knob can replace the damaged, dirty, or old volume control knob, mainly used to adjust the sound output of the electric guitar. Widely used for 24 fine-spline USA / CTS style split-shaft pots used on most guitars.What will I get?Spline shaft: 6mm / 0.24''Base diameter: 26mm / 1.02''Height: 13mm / 0.51''In the package of: 4 × Guitar Volume KnobsAre there any advantages of the product?Made of plastic material, it is durable and resistant to breaking or bending. The surface is smooth and won't scratch your hands.How to use it?The 6mm round shaft can be pushed in easily for a snug fit and secure fit. The 360-degree knob makes it easy for you to control the potentiometer.What should I notice?Please double-check the spline of your pot before ordering.