Callaway Golf Diablo Edge Hybrid Irons Combo Set Maximized Distance A lower, deeper CG is designed to make the sweet spot more accessible at lower impact locations Set Options There?s more distance through the entire bag by opting for matched hybrids in the set Smooth Turf Interaction The Solid Impact Sole is designed to mitigate the effects of heavy and thin shots Enhanced Feel and Performance Callaway Golf core technologies like VFT, S2H2, a 360-Degree Undercut Channel This product comes with a headcover with an interchangeable tab to indicate the respective club number (3, 4, 5, 7, 9 or X)