At Caswells Strings we carry a large range of tuners and metronomes from all the well known brands. The Intelli violin tuner is a best seller being simple and precise but for more accurate tuning a clip on tuner that utilizes the vibrations is a good bet. Korg, Seiko and Snark are all quality brands while Wittner mechanical metronomes are not only excellent but look superb on the piano.