When Wayne Carlton brought diaphragm calling to Elk hunting, he had 3 things in mind: reliable, realistic and hands free. The next revelation in Elk diaphragm calling is here - enter tone trough! Elk diaphragm calls with tone trough create perfect pressures for loud vocalizations, just what you need when you're trying to locate and coax in big Bull Elk. Wayne Carlton's Elk arsenal includes four (4) tone trough Elk diaphragm calls: single, double, Triple and cow and calf. Use these calls to create great Elk Herd vocalizations, from Bulls to cows to calves. The premium Flex process and Infinity latex makes for longer lasting calls that are more consistent and comfortable to use. In fact, the latex comes alive! made in the U.S.A.