TAMA double pedal with IRON COBRA FLEXI GLIDE strap and Cobra Coil. The Iron Cobra has been evolving daily for over 20 years. Thanks to the innovative Cobra Coil spring, the HP900FSW gives you an incredibly smooth and fast response, as the beater quickly returns to its original position after each kick. The HP900FSW is 40% lighter than the previous Iron Cobra model, surprisingly stable, and its durable construction promises long-term reliability.