U.S. Patent No. 5,910,039 and Others Pending. Patented "ridges" and "ditches" on the sounding board keep the call from sticking or freezing while giving the call its raspy highs and lows. Internal parts are molded from graphite (the ideal sound conducer) giving the Wench its unique range of tones. Super-hard polycarbonate barrel for intense volume. Perfect for the traditional waterfowler who prefers simple, no-hassle calling.