These are wine watchers repurposed to make practicing fun. åÊThis silicone monster will fit around the stick of the bow and watch your playing. åÊThe feet hang down slightly over or under the horsehairs to stop the bow from playing past that point in the bow. åÊPlease note that these are loose around the top half of the violin bow. åÊThey fit great around the bottom half of the bow and the frog.