Cleveland's new CBX ZipCore Satin wedge features a cavity back design with tons of forgiveness without sacrificing workability. ZipCore technology is a low-density core in the middle of the club that reduces vibrations and boosts MOI to perfect CG and forgiveness on each shot. UltiZip grooves are sharper, deeper and closer together for more shot efficiency and maximum spin. Two extra grooves offer more contact across the face. The hollow cavity design places weight in the toe with a hollow chamber near the heel to give you a more balanced wedge that's forgiving all over the face.