The Hammer Web Tour Edition gives a silky smooth reaction by combining the TourV1 coverstock with a modified Spheroid core. The TourV1 coverstock has been researched, tested, and tweaked to develop the most forgiving coverstock that Hammer has offered to date. The original Spheroild core has been modified to have less flare and more control. This ball has been designed to create a stong midlane reaction with a continuous backend on medium 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.