Yonex Badminton Racquet Voltric 25i (Strung)Description: The square shaped ISOMETRIC frame shape is designed to keep vertical strings at a similar length, as well as the horizontal strings to produce an expanded sweet spot in all directions. The single pass grommet hole construction provides more grommet holes for a more high performance stringing pattern. Aerodynamic contouring of the top of the frame minimizes air resistance so air flows faster across the curved surface during the swing,