The Hammer Rip'D introduces the Aggression Hybrid CFI coverstock and is combined with the Rip'D core. This core shape is a combination of the Scandal and Gauntlet core shapes and carries their success. This ball is designed to provide length through the front part of the lane and give a powerful backend reaction when used on medium to heavy oil conditions. This bowling ball is Carbon Fiber Infused! Carbon fiber is one of the toughest materials on earth. Hammer decided to add this material to the inner core of this ball for added strength and durability allowing them to offer an incredible 3 year warranty.