Effectively mutes without distortion or interference with the bow. Mounts on the middle strings between the bridge and tailpiece for convenient, instant access; simply slide into place to mute. Eliminates the need to pocket or store the mute when not in use. Simple, cleverly designed wire frame, with contoured clear plastic tubing and brass spacers to fit the bridge curvature. Available for violin, viola, cello ans bass. Made in USA.