The Artino SP-3W Resonance Pin Stopper for Cello is not only a endpin rest, but also a Sound Enhancer because the round wooden box is empty with the unique resonance hole. The chair strap helps tremendously on any slippery floor while the rubber padding additionally holds it in place and protects the floor. The easy to find dimple holds the endpin in place. Made of rosewood, it will hold up to years of use. This stylish, functional, high quality piece of equipment is a tremendous value.