Why only one iron fitted? in (The 19th Hole) Posted November 21, 2013 Think about your costs, too. Take how much money and time a fitting costs for just the 6i, and times that by 7-9 (depending on how many irons you buy). Sets of irons are already expensive... why incur even more costs when the majority of golfers wouldn't even notice a difference? When it comes to irons, it's usually a good idea to maintain a uniform pattern amongst the set.