As with all of our Rolled Tone Hole models, our truly unique rolling process uses the saxophone's existing material; unlike rolled tone holes of the past, there is no soldering here, the tone holes are drawn from the body and then rolled over allowing superior resonance throughout the entire saxophone and increased response in all ranges. We've also enlarged the bell to compliment an already warm, fat sound. PMXT-66 RX is fitted with oversized nickel silver key touches to achieve an effortless feel and to further facilitate natural vibration throughout the horn, bringing you even more in touch with your sound.