Super compact, yet super tacky endpin rest for cello or bass. Works on almost any surface, even marble and parquet floors. The Dycem Black Hole Cello Mat is a simple and effective means of holding the cello in place - the smoother and harder the floor, the better it works. Just place the Black Hole Cello Mat in position and let Dycem's unique non-slip properties do the rest. No messing around with strings round the chair legs. Easily carried in the pocket or in the case.