The PQ-9100-00 is a great option to upgrade or replace the saddle on your Martin acoustic guitar. It is pre-shapped for a quick and simple install. TUSQ delivers a rich tone, crystal clear bell like high end with big open lows and a significant increase in harmonic content and harmonic sustain. Increase harmonics equals more richness and character in your tone. Its the difference between a four piece choir and a twelve piece choir singing every time your play a note. Dimensions: 73,86 x 2,57 x 9,73 mm.