Callaway Golf Men's Edge All Golf Hybrid Irons Set, Set of 8 Clubs High MOI Design: It's incredible, the amount of forgiveness and playability our R&D team put into the Edge Set High Launch Hybrid Design: The higher launch angles created by the optimized CG location make these hybrids the easiest to hit in the Callaway lineup Hollow Iron Design We lowered the CG, increased forgiveness and launch angles and now we know for sure these are the easiest-to-hit irons we make Set Progression: Distance and accuracy are built into each club, designed for maximum forgiveness and easier to hit hybrids that replace long irons