The Rovner 4R Bass Sax Ligature offers the free-blowing performance of a string ligature with the convenience of a standard screw ligature. It features rubberized polyester fabric and machined brass hardware. Rovner Ligatures greatly improve reed playability. Reeds that are totally unplayable on other ligatures will often perform well with the Rovner. The ability of the Rovner Ligature to extend reed life is exceptional. More rigid ligatures actually hammer the cane fibers during vibration eventually destroying the reed s tonal vibrancy. Not so with Rovner; most players find their reeds will play until the tips finally succumb to fatigue and fall apart.