This “improvement” racquet is considered the flagship of the [K]Factor line and is loaded with all the latest technological features including the exclusive [K]onnector system. The [K]One is the first racquet of its kind to bring maximum power with a great combination of control and forgiveness in an extra-light frame. Producing explosive shots with unmatched control, the [K]One is an almost unfair advantage on court. Specifications: Headsize: 122” Strung Weight: 9.4 ounces Length: 27.5” String Pattern: 16 x 19 Strung Balance: 11 points HH Cross Section 30 mm Grip Sizes: 0 – 5 [K]arophite Black [K]onnector [K]ompact Center [K]ontour Yoke Double Hole Product Reviews: I've had Wilson T3 racket for the last few years & just changed to K-one. I know it's a huge head size racket but it really gives me the extra depth, pace & pop on every parts of my shot with just the right control. It is working great for my game. One drawback is that it's so large I feel that I can't maneuver (I mean changing the grip here) it as well when I'm chasing down a ball. Beside than that, I love the racket! – Songhee, Ashburn, VA, USA