Features ProBeat Configuration features 9"x13" Tom, 16"x16" Floor Tom & 14"x24" Bass Drum Punchy, controlled, focused, EQ'd cut with quick decay. Immediate response under high-impact play at lower tunings. 5-ply combination of Classic Maple three-ply core between inner and outer 1/16" plys of American Red Oak creates a thin, dense shell that speaks loudly with quick, even decay. 45-degree bearing edge is pulled to the center of the shell to seat perfectly into the head. Includes: 3-Pc Shell Pack, 5A Promark LA Special Drumsticks, Drumset Survival Guide, Bass Drum Pedal, Zildjian A390 Cymbals, Aquarian Drumheads & Hardware Pack Description Product Description Keystone Series Drums carve a new niche in Ludwig's sonic identity. In fusing a Classic Maple shell core with American Red Oak, Keystone's "pre-EQ'd" tone sculpts focus and articulation for the drummer seeking volume, attack, and power. Keystone Series is made under the same strict quality and structural standards as all Classic Maple and Legacy drums. A perfect balance between high-volume cut and subtle articluation is achieved for the live music drummer, putting a modern twist on a century of custom American drum making.