The cavity back is back\'...Padraig Harrington won back to back Open titles in 2007-2008 with Wilson Staff clubs, nothing else has to be said..... Wilson Staff is one of the market leaders when it comes to golf club technology. They offer a full range of clubs for all abilities. Their new to the market Wilson Staff Model CB (Cavity Back) irons are Inspired by the Wilson Staff V6 Iron set, the Model CB Irons feature modern control, full workability and forgiveness across the entire set. The classic looks pay tribute to the long and illustrious back era of Wilson Staff models.