Abstract: Slide bars are used by musicians when playing string instruments to achieve different effects and sounds to stylize their musical compositions Existing slide bars, when not use, are usually removed, or rotate with difficulty around the finger, to continue play thereby interrupting play for a short, but discernible, period of time The slide bar devices and assemblies of this invention are easy to use and reduce down time to a non-discernible degree The slide bar device has a slide member with a longitudinal axis and an outer surface for contacting all of the strings of the string instrument. A ring member is attached to the slide member and adaptable for wear around any of the musician's fingers. The axis of the ring member is parallel to, and spaced away from, the axis of the slide member The center of gravity of the slide member is spaced away from, and radially outward of, the ring member.