Reduce your string breakage for a great price!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 sound Pros AVT-2 and pigtail style wrap-around bridges. These bridges are usually stamped on the bottom to designate model number. (Tone Pros AVT-II and Pigtail wrap-around)Minimizes tuning errors, prolongs string life.FeaturesIncludes 6 saddlesPart Number: PS-8617-00