String Saver Originals have a more balanced tone, with highs, mids and big open lows. You will also notice an increase in sustain by up to 25% over brass saddles and 15% over steel. * Fits Tune-O-Matic Tonepros By GOTOH. These bridges are usually stamped on the bottom to designate model number. (TonePros GOTOH) * Minimizes tuning errors, prolongs string life. * Includes 6 saddles * Part Number: PS-8600-00