Wilson describes the Wilson Staff Di9 irons as "a technology-driven combination of power and forgiveness with a high-MOI head design and urethane shock-traps, delivering softer feel and longer distance." Fat Shaft Wide Tip technology provides a high-stability head, with more resistance to twisting on off-centre strikes. Toe-weighted sweet spot offers improved distance on slight miss-hits. A wide sole moves the centre of gravity deeper in the clubhead for high-launching carry. The Di9s come in two steel shaft options