Wilson's [K] Four.FX racquet is a mid-range racquet targeted at beginners. The frame material uses Wilson's "Karophite black" material, which strengthens the graphite and silicon-dioxide structure, and the frame has enhanced stiffness at certain points which improve stability under torsional forces. The grommet holes on this racquet are also larger than usual to allow for further string flexing for a smoother stroke. This racquet has an oversized head and weighs in under 10 ounces. Its strung balance is 0 points head-light.
- "[K]arophite Black" frame material
- Compact center
- 9.9 oz. (strung)
- Balance: 0 pts. HL
- Double-sized grommet holes
- "[K]ontour Yoke" added frame stiffness
- 29 mm dual-taper cross-section
- Length 27.5"
- Headsize 107"