Bill Saragosa - This instrument was developed in collaboration with Meinl Percussion artist Bill Saragosa Helix Bowl - This instrument consists of a steel spiral welded to a resonance chamber Percussion Instrument - The Helix Bowl musical instrument is played with a beater, either stroked or struck Wide Sound Spectrum - When struck on the body, this effect instrument produces a wah-wah effect Includes Metal Beater - This special musical instrument comes with a matching metal beater included