Hammer Black Pearl Urethane Cover - Polyester Textured They are available for purchase

They are available for purchase separately should you choose to add one

Spandex finger gussets for comfort and breath-ability

padded shoulder straps

You’ll see it hook hard without getting stuck early

The KR Strikeforce Pro Rev 2 features a shorter design to provide medium power for light to medium oil lane conditions

Hammer Black Pearl Urethane Cover - Polyester Textured They are available for purchaseHammer Black Pearl Urethane Mid Performance Bowling Ball Hammer has been the undisputed urethane champion in bowling since the Purple Pearl Urethanes introduction, and we are excited to carry that title through the new phase of harder urethane bowling balls. Since the PBA announced its rule change, only allowing urethane balls to be 78D or harder, our chemists and lab rats have been working hard producing the now famed NU Blue Hammer and the new 78