Double Bass Drum Pedals, Double Chain Drum Step on Hammer for Drum Set and Electronic Drums. 1? Double cam pedal increase the service life 2? Add some complexity to your beats 3? The fully adjustable power cam system offers accelerated beater speed 4? Double spine weighted pedal plates for a sturdy flat-footed kick, and beater shaft locks to ensure the beater stays in the correct position at all times. 5? The beater shaft keeps the drummer in place and special clamps provide the pedal safely connected to the bass drum.