Blade SW104 Autograph Countervail was made to honor one of the game's greatest legends - Serena Williams. With an extended length of 28 inches, this racquet not only gives you extra reach, but it will allow you to attack the ball with lethal momentum. Factor in the juicy 104in² headsize and the result is massive power on full swings. There's also impressive directional control thanks to the dense 18x19 string pattern, a fact that should enable aggressive players to drive the ball powerfully through the court. To help with comfort, Wilson constructs this stick with Countervail, which is a uniquely flexible carbon layer designed to filter out harsh impact vibrations. Wilson also gives the SW104 Power Holes, which enables the string bed to soak up additional shock and transfer more power to the outgoing shot. From the baseline Serena's racquet is a power player's dream. With its high swingweight it requires solid mechanics, but those who can swing it fast will be rewarded with devastating power.