A versatile and economical alternative to tuning fork sets. This single fork is essentially a seven-tone set with physical-pitched frequencies of the C Major scale: 128C, 144D, 160E, 170.7F, 192G, 213.3A and 240B. The adjustment weights are easily adjusted into position using the scale lines engraved on each tine. The nylon set screws prevent scratching of the polished aluminum fork and increase tone quality. A great space and money saver.