The Mack Daddy 4 is the new standard in wedge performance, led by our innovative new groove-in-groove technology for more spin. The absolutely stunning new Callaway Mack Daddy 4 Wedges are designed with new Groove-in-Groove technology to deliver maximum spin and control. The proprietary Groove-in-Groove Technology in Mack Daddy 4 Wedges is designed to maximize spin for aggressive shot-making and control. Due to unprecedented demand across the industry, causing a shortage of shafts and grips, we may need to substitute for an equivalent premium shaft/grip.