Wilson Staff Model D9 Golf Irons – Ladies The Wilson Staff Model D9 Ladies Golf Irons are built to offer high launch, lower spin, and incredible stopping power for pinpoint accuracy. Wilson has used a revolutionary approach to Iron design, with the aim of improving your game. Urethane-Filled Power Holes These have been strategically positioned to enable maximum face flex, improving ball speed and expanding the sweet spot, adding forgiveness to this Club. Low Centre of Gravity This is Wilson’s lowest-ever CG in an iron. This has increased launch angles, delivering a steeper angle of descent for improved green-side control.