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 Drive Footboard Longboard Machined Aluminum Bearings Ninja Bearing Spring Extreme High-tension Spring (Normal Spring Included) Beater X-treme Impact Beater (B350xr X2) Tension Adjustment Click-lock Beater Angle Uni-lock Beater Angle Case Included Hoop Clamp Pivoting Hoop Clamp Hoop Clamp Tension Bolt Wing-bolt (Key-bolt Included) Universal Drive Shaft Z-link Drive Shaft