Mens Blue Irons #5 Thru Sw Dynalite Slimtech Steel Velocity Slot TechnologyTM - The sole slot gives golfers more flex and more speed, across a larger area of the face Low/Back CG - Keeping the CG low & back allows for more spin and more speed on more shots SlimTech Shaft - Allowing for more kick and easy launch-Irons - .350" Tip (vs .370" in "other products")