The company's professed flagship Maple drum kit, featuring 100% Maple wood, and the "Yamaha Enhanced Sustain System" (YESS) which mounts the drum at its nodal point, a technique developed by Noble and Cooley. Maple is perhaps the most widely used wood in drum construction, rivaled only by Birch. Maple is desirable for producing a warm tone, full sustain, and outstanding projection. Toms are 7 plies thick, while the bass drums are 10, making it exceedingly rich in tone.