Unmatched control and feel, period. Choice of the world’s number one player, Roger Federer, the integration of [K]arophite Black elevates the [K] Six-One Tour as the new benchmark of precision to take control to the next level. This racquet is classified by Wilson as a “player” racquet. Steady. Precise. Elite. Specifications: Headsize: 90” Strung Weight: 12.5 ounces Length: 27” String Pattern: 16 x 19 Strung Balance: 9 points HL Cross Section: 17 mm Flat Beam Grip Sizes: 2 – 5 [K]arophite Black [K]ompact Center Product Reviews: Jon - "The K Six.One Tour 90 would be well suited for the 5.0+ player looking for new technology with an old school feel. This racquet is definitely not for your average player. I was supremely impressed with this stick, but I don't think I could switch to this racquet quite yet. It's still a little (OK, probably A LOT) beyond my ability. The KFactor 90 does have some advantages over its predecessors. I would definitely suggest giving this racquet a look if you are a 5.0+ looking to replace a previous Tour 90 model, or if your [sic] ready to make the jump into a Tour level racquet."