Dixon Precision Coil Double-Chain Double Bass Drum Pedal w/ Bag. The precision coil chain drive double bass drum pedal from Dixon is the missing piece of your drum set you didn’t know you needed! Open coil helical spring compression system. Double chain drive accelerated cam system. Easy access hoop clamp. Independent footboard and beater adjustments. Dual surface self adjusting aluminum beaters with beater weight and memory lock. Steel stabilizer plates with rubber grips. Smooth surface footboards for rapid response. Pedal Drive Type : Chain Drive. For Instrument : Drum Set.