Totally Adjustable Pro Chain-drive Double Bass Drum Pedal W/ Zero Latency U-joint. Duo-deck Convertible Short/long Footboard. Micro Polished Ninja Bearings For The Smoothest, Most Fluid Pedal Flow Available. Control Core Beater Features Anti-vibration Elastomer Core. Perfect Circle Linear Chain Cam And Ultra-lightweight Chain Provides Consistent, Smooth Feel.