Double Bass Pedal, Double Chain Drive Bass Drum Pedal, 2 Two-Sided Beater Head Kick Bass Drum Pedal, Non-Slip Footplate, Kick pedal for Beginner and Pro Drummers. Double Chain Drive: Cam design, double chain drive response is fast and powerful Double-sided Hammer Head: Double-sided strike, providing a variety of tones and percussion frequencies, with a clear drum feel, suitable for a variety of music styles Spring Tension System: Effortless hitting, quick rebound, adjustable tension. Flexible and adjustable connecting rod, easy to disassemble. Durable & Stable: Professional non-slip base plate and large frame design provide excellent stability and durability during practice and performance Products Include: 2Allen wrench, 1Drum key, 1Double bass drum pedal.