The tightening by a single central screw ensures an even distribution of the pressure on the reed and allows the reed to vibrate freely without damping the natural vibration of the mouthpiece.
Thanks to the resonating pipes this ligature generates a range of sympathetic vibrations that enrich the player's sound.
The Ultimate Ligature comes in three finishes:
The Brass is more resonant and vibrating.
The Silver is more resistant and darker.
The Gold has more "elegance" and a slicker tone quality (polished).