Falcon Double Bass Drum Pedal Left Lead. The interchangeable drives (sold separately part # ACF-DD, and ACF-SD) allow players to purchase only one pedal, but still have the freedom to experiment with the differences between chain, strap, and direct drive feels. It also enables double-pedal players to use different drives for each pedal to balance the feel between the left and right feet. The interchangeable beater weights, variable footboard height, and adjustable beater angle allow for simple and fine adjustment of torque and power. The smaller size of the base-plate makes it easy to position a double-pedal around snare stand legs and closer to the hi-hat pedal.