|The Hammer that started it all the 2.7 re-introduced with Hyper Carbon, Stable Step Design and Iso-Zorb grommets. Superlight and powerful, the new Hyper Hammer 2.7 is destined to make some history of its own. HYPER CARBON TECHNOLOGY: Hyper Carbon is the lightest, stiffest, and strongest material ever used in tennis racquets. Compared to Titanium, Hyper Carbon is 4 times stiffer, 65% lighter, and 4 times stronger. 2 layers of Hyper Carbon and 5 layers of Graphite are used in the application of Hyper Carbon. Hyper Carbon is used in the Horizontal Axis cross section, increasing stiffness which creates more power. It is also used in the Vertical Axis cross section, increasing torsional stability which creates more control. HAMMER TECHNOLOGY: Weight is reduced in the shaft and handle. With today's racquets getting lighter and lighter, maintaining mass (weight) in the head becomes more important than ever. With Hammer Technology, weight is maintained throughout the head of the racquet, resulting in increased stability and more power. This also results in a higher and larger sweet spot. Swing Index 2.7; Stroke Style -- Compact; Swing Speed -- Slow.