DW Drums 9000 Series XF Extended Footboard Double Bass Drum Pedal with BagExtended Footboard Design: Provides larger surface area on both pedals for enhanced control and comfort. Infinitely Adjustable Cam: Adjust your cam from Accelerator to Turbo with ease. Tri Pivot Toe Clamp: Securely attaches to bass drum hoops without damage. Dual Spring Rocker: A swing mechanism at the cam and post allow the spring to move freely. Floating Rotor: Dual bearings allow for a floating action that is smooth and responsive. Delta II Ball