Gibraltar Single Chain CAM Drive Double Bass Drum Pedal Model # 5711DB. Description: This Gibraltar Single Chain CAM Drive Double Bass Drum Pedal is Brand New in the Box. The Double Bass Drum Pedal is New-Open Box, as it was used as a Display Model in our store. It is still wrapped in the original bubble wrap and paper from the factory. Please see photos for items included in sale. Please see photos for confirmation of item condition. Please read our terms and policies.