The Championship Bass Drums were designed with the same formula used to design the FFX snare drum and Championship tenors. 6 plies of 100% Maple shells offer maximum resonance and huge sub-frequency projection. To compliment the Maple shells. 2" wide 6 ply Maple Hoops are secured by extra wide claws for an evenly dispersed pressure for consistent tuning. Lightweight one-piece high strength aluminum castings and 6mm case-hardened tension bolts provide uncompromising strength and durability for years of high performance use.