Bill Keith is unique individual. On the one hand he is a great and legendary creative force on the five string banjo- single handedly revolutionizing banjo playing with his "melodic style" On the other hand, he is a mechanical genius- inventing a complex high quality "D" tuners that are the finest available (and copied) in the world. We are pleased that Bill has allowed Acoustic Vibes Music to distribute his fine products. Remember he also makes standard tuners that match the "D" tuners for all of you banjo perfectionists out there!