The Pearl Demon XR Double Pedal delivers the same machined design and fluid action of the Demon XR Single Pedal but with the zero-latency action of the included Z-Link machined aluminum universal pedal linkage. Each pedal performs with the same enhanced rebound action with its own interchangeable high-tension spring for repeated strokes in the most extreme musical situations.Drive Direct DriveFootboard Longboard Machined AluminumBearings Ninja BearingSpring Extreme High-tension Spring (Normal Spring Included)Beater X-treme Impact Beater (B350xr X2)Tension Adjustment Click-lockBeater Angle Uni-lock Beater AngleCase IncludedHoop Clamp Pivoting Hoop ClampHoop Clamp Tension Bolt Wing-bolt (Key-bolt Included)Universal Drive Shaft Z-link Drive Shaft