Gibraltar 6711S Dual Chain Double CAM Drive Single Bass Drum PedalFast, double CAM action with simple execution. New features include; fast touch G pedal board design and dual surface balanced bass drum beater. Single pedals have a two bearing per drive system; four on double pedals. Easy key access adjustable hoop clamp, adjustable spring tension and Rock stabilizer plates with spring loaded spurs and just enough Velcro to hold position. Specifications Double chain drive Fast, powerful, double CAM action with