This unique flexible plastic device is designed to help beginning violinists practice the dreaded task of straight bowing! The Bowzo easily slides over the fingerboard and clips onto the bridge, leaving a gap where the bow will fit comfortably onto the strings. Adjustable (to or from the bridge), no buzzing, and a cinch to use; fits 1/4 - 4/4 size violins and 11" to 14" violas. No more sawing the strings!