GP Percussion Pro-Quality Double Bass Drum Pedal: * Chain drives and multiple-style beaters * Mostly cast parts including the base and pedal * Allows one to play a double bass drum set * Use both beaters on a single pedal for heavier hitting * Center linkage: adjusts from 15-22.5" * Overall width: approximately 13-38.5" * Includes drum key * Dimensions: 31"W x 13"H x 13"D