Roto Grip Bowling Balls. Innovation, Versatility, and Superior Performance defines the Horizon Solid™. This newest release from Roto Grip™ is sure to be one of the most sought after balls of they year for several reasons. First of all it comes to you at a performance price. Roto Grip™ has a history of bringing you some of the best performance priced products over the last several years. We pride ourselves in giving you more “bang for the buck” than anyone and this one delivers yet again. Second, we utilize the new Helios™ core found in the original Horizon™. This single density symmetrical core boasts a lower RG for mid lane read along with a medium to High Differential for that strong continuation down the lane. That translates into pin shattering carry from any angle. Finally, we surround the powerful core with our most versatile solid coverstock to date Ultimate Grip™. Versatility is the key to this shell. The 800 Machine finish gives you all the traction you want in oil as well as superior traction on the backend. Add some polish and you can create more length and even stronger backend motion on those lighter volume patterns.