The newly developed “Duo Glide” mechanism allows the use of different actions (Power Glide and Rolling Glide) with a single cam, and the main specifications of the “IRON COBRA 900 Series” such as the double chain and Speedo-Ring have been inherited. The “IRON COBRA 900 Series” features a “Duo Glide” mechanism, double chain, Speedo-Ring, etc. And is priced reasonably. Series: Iron Cobra 600 Series. Cam: Duo Glide (Power Glide/Rolling Glide). Beater: Dual Sided Beater. Standard tuning key included. This is a newly developed cam that offers two selectable actions in one model: a power glide with a powerful and speedy stroke, and a rolling glide with a straightforward and stable feel. Like the HP900 series, the double chain drive provides smooth and precise stroke and high durability. A brass sleeve is inserted in the hinge of the footboard, which is the key to stable pedal work, to suppress lateral movement during play and further improve durability. High-precision ball bearings are used in the rocker cam rollers that transmit spring tension to the shaft. This reduces power loss in the moving parts, resulting in quicker response. International Buyers – Please Note. Thank you for your understanding.