The Wilson [K]Four 105 has [K] factor technology which is the combination of many different components working together within the racquet. Wilson claims these new technologies are going to revolutionize control in the game of tennis. World #1 Roger Federer contributed some invaluable input concerning the design and performance of these frames. The [K]Four 105 is new territory for Wilson's "Four" line. Never before have they offered a medium powered, nearly even balanced racquet like this one. The result is a very maneuverable head combined with a nice amount of power.

Wilson KFour 105 Headsize 105 sq. in. Length 27.25 in. Power Level Medium Strung Weight 10.1 oz. Swing Speed Medium-Fast Balance 3 pts. HH Swing Weight 322 RDC Stiffness 73 Grip Type [K] Grip Composition [K]arophite Black/Graphite Cover Included? Yes String Tension 53-63 lbs.

This racquet is pre-strung by the manufacturer.