Wilson - D9 LADIES RH 7-PW,SW - Shaft Graft The D9 irons from Wilson replace the D7 irons. The newly developed D9 irons have progressive power holes in the sole, which gives more length on the long irons and more feel on the short irons.The ultra-thin striking surface provides greater ball speed and thus optimized length. The D9 irons have the lowest center of gravity of all our irons. This means better spin and higher launch data, giving you a better chance of hitting the stroke you wantModel number WGR200012+