Gruvgear Fretwraps XL, Set of 2, professional string dampener / muting accessory, Slide on a FretWrap to effectively cut overtones, open strings and sympathetic resonance during recording, live performance, two-hand tapping. The adjustable strap lets you fine-tune the pressure and dampening of the strings. Quickly slides over the headstock when not in use. No special guitar modification, installation, or tools required, Size: XL - Fits 9- 12-string basses, Chapman Sticks, double basses & extended