Bass Pedal with 2 Dual-chain Drives, 2 Sets of 4 Interchangeable Cams, NiNja Axle Bearings, and 2 QuadBeaters, Hi-hat Stand with Interchangeable Cams, Adjustable Footplate Tread, Swiveling Legs, PowerShifter Footboard Adjustment, and Precision Spring Tension Adjustment Dial, and Drop Clutch for Hi-hat Stand with Locking Nut