By combining the best parts of their Optimum series with the lauded history of the Masters ligature, Vandoren's M|O Ligature is part classic, part contemporary, and purely professional grade. Much like the Masters ligature, M|O ligatures are lightweight for an almost unnoticeable feel and no unwanted pressure on points across the reed. In contrast to the commonly used 2-screw method for securing ligatures to a mouthpiece, M|O ligatures boast a single screw with two contact points.