he said x 20 tour and those come with project x flighted, the project x flighted have different kick points thorough out the set, low kick point in the long irons for higher ball flight, same kick point in the mid irons as the normal px, and higher kick point than the normal px in the short irons for lower launch. The main complaint about project x is that many people they feel boardy due to the stiff tip, many people go down .5 and are very pleased with the feel. They are a mid/high launch lower spin shaft, this makes them preform very well into the wind. They preform best for people who tend to take large divots. Hope this helps.