Dual concentric stacked knobs, to achieve 'Tone & Volume Adjustment' on the same knobs.
Fit for electric guitars and bass.
Made of high quality alloy metal, providing long durability.
Package comes with 2 sets; there are 3 colors for option -- silver/ black/ gold.
100% Brand new and testing is fine.
Features: Dual concentric stacked knobs, to achieve 'Tone & Volume Adjustment' on the same knobs. Fit for electric guitars and bass. Made of high quality alloy metal, providing long durability. Package comes with 2 sets; there are 3 colors for option --  silver/ black/ gold. 100% Brand new and testing is fine. Specifications: Material: Alloy Metal Color: Silver/ Black/ Gold (optional) Item Size: Refer to the picture for detailed size Item Weight: 30g / 1.06oz Package Size: 7 * 5 * 2cm / 2.76 * 1.97 * 0.79in Package Weight: 62g / 2.19oz Package List: 2 * Dual Concentric Knobs