Callaway Golf Men's Diablo Edge R Irons Set (Set of 8 Total Clubs: 4-PW, AW, Left Hand, Steel, Uniflex) Benefit #1: Maximized Distance, Feature: A lower, deeper CG is designed to make the sweet spot more accessible at lower impact locations. This generates longer, more consistent distance and improves accuracy for more greens in regulation. Benefit #2: Better Forgiveness. Feature: Each iron has been perimeter weighted for increased MOI and greater forgiveness on off center hits. Benefit #3: Smooth Turf InteractionFeature: The Solid Impact Sole is designed to mitigate the effects of chunked and thin shots to improve efficiency at impact.