Signed by Roger Federer, the men's champion pro, this titanium-alloy tennis racquet has Volcanic Frame technology for power and stability, frame stabilizers for control and accuracy, and a Cushion Pro Grip for comfort. The racquet weighs 9.9 ounces and measures 27.5 inches long, with an oversized 110-square-inch head and factory stringing. The grip is 4.5 inches in diameter.