Yamaha DFP9D Direct-drive Double Bass Pedal Features: Smooth, stable direct-drive double pedal Swayless design and sport bike-inspired visuals Ball bearing-loaded pedal linkage Quick-Adjusting Links with three settings Ergonomic self-locking spring tensioners Weighted beater system with removable weights Independent beater angles and footboard heights Hinge bearings, front and rear spikes, and Yamaha's Axle-Stabilizing Bearing Chambers eliminate play Under-axle subframe keeps pedals from flexing Includes carry case Tech Specs Single/Double:Double Drive System:Direct Drive Manufacturer Part Number:DFP-9D