RotoGrip Bowling Balls. Since the dawn of the 21st Century no one can compete with the success that Roto Grip has had in the midprice category. The introduction of the allnew HORIZON reinforces that truth by building upon the legacy that the Retro Line and the RS Series have established.Featuring the new Helios weight block this unique design delivers a lower RG and medium differential for consistent midlane motion along with an angular move off the spot. The single density core guarantees a higher coefficient of restitution for increased hitting power even on those offpocket hits!We have taken the best characteristics from our past and have created the outstanding Ultimate Grip pearl reactive coverstock. It comes to you in a 1500 grit polish for added length and maximum energy retention at the break point on those medium patterns.The dawn of a new era is upon you so jump on board or get run over!ROTO GRIPs "PRO PIN" technology is taking layouts and ball reaction to the extreme. Once only used on the Professional Tour for condition specific drillings these balls are now being made available in limited quantities to the general bowling public. Why As the requests requirements and styles of today's bowler changes to address new lane conditions and patterns STORM is answering by providing and packaging these items separately from the standard first run items due to their unique nature and value.ROTO GRIP "PRO PIN" bowling balls are All first quality ROTO GRIP bowling balls Manufactured with the same high quality standards as all other ROTO GRIP products Manufactured with the highest integrity Made with the same high quality materials as all other ROTO GRIP products Great for specialized layouts and drilling options Potential for enhancing dynamic use of core position Meet all A.B.C. U.S.B.C. and P.B.A. regulationsROTO GRIP "PRO PIN" bowling balls are first quality bowling balls with pin distances over 5" from the center of gravity and top weight between 2 and 4 ounces.