This accessory is for the young cello players who wish to better their way to play, avoiding the bow to slide too much towards the fingerboard, where the sound is less incisive and unclean.
Its regular using, especially for studying, helps to play nearer the bridge, so that you can exploit the whole technical and sonorous potential of the instrument.
The particular construction allows to adapt it in a very simple and quick way to all of the 3/4 and 4/4 cellos, without making anything to the instrument. Moreover, the distance between the bridge and the slide bar is adjustable.
This accessory doesn't want to be the one way to reach a correct way to play, but it can be a good help!