The Jews harp (German: Maultrommel) is a small musical instrument consisting of a metal frame and a steel tongue or reed. The player presses the instrument between his or her teeth and plucks the flexible steel reed, which vibrates and uses its players head as a resonance chamber (see Jew's Harp Playing in Austria). The Jews harp is thought to be of Asian origin, although finds in castle ruins and artistic depictions in frescos and paintings make it clear that it was also common in Europe by the Middle Ages. The existence of a Jews harp makers guild in Molln is documented as early as the 17th century. While 33 master makers were active around 1800, there are now only three family businesses still in existence today. Jews harps production consists of three main steps: the creation and bending of the frame, the stamping out and installation of the spring in the frame, and the fitting of the frame and shaping of the spring. Depending on the standard of quality that a Jews harp is intended to meet, production is done either completely by hand or with the help of machines.