Signature Music Pro Double Bass Drum Pedal New. Horizontal frame brace, Double Chain Drive, Carpet locks, Silent action. One-hand spring tension adjustment, Beater angle and beater head adjustment, Low mass aluminum drive shaft. Metal construction, Roller bearing assisted pendulum. Heavy Duty Angled Floor Base Plate, Heel is tapered for comfort and control. Quick release hoop clamp, Spring lock system. The SMI Base Drum pedal is everything you need and demand in a foot pedal. All of our instruments have a 1! . We sell to many schools and colleges. Our company is a proud member of: NAMM.