The PQ-9000-00 is a blank TUSQ acoustic saddle with a slight radius on top. It is a great option for someone who wants to custom shape a new saddle. A lot of the work is already done for you. 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.