Interchangeable Cam System (US.PAT.#6172291)4 individual camsChain Drive - Crankless double chain drive provides silent, super smooth action with powerful and precise feel.Click-lock spring adjustmentControl Core Quad Beater (US.PAT.#5610351)
Pearl P2052C Eliminator Double Bass Drum Pedal-Chain Drive
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Vaguelly Tread Hammer Accessories Bass Drum Pedal Chain Kick Pedal Double Pedal Drum Pedal Beater Mallet Guitar Pedal Bass Pedal Electric Drum Pad Pedal Drive Bass Drum Pedal Aluminum Alloy
Bass drum pedal,Double Chain Drum Step on Hammer,Single Bass Drum Pedal come with Drum Beater Stick
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