The VENDETTAtrade BLACK SOLID produces a smoother transition from roll to hook by combining successful core design with a matte finish solid resin coverstock. The VENDETTAtrade BLACK SOLID is engineered to perform on most oil conditions. Dyno Thane's 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.Dyno Thane PRO PIN bowling balls are All first quality Dyno Thane bowling balls Manufactured with the same high quality standards as all other Dyno Thane products Manufactured with the highest integrity Made with the same high quality materials as all other Dyno Thane 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. regulationsDyno Thane 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. Through our testing, we have found that these balls lend themselves to a variety of drilling patterns outside the range of pins less than 5 which would require an extra hole to accomplish with standard pin and top weight specificiations. Based on the desired reaction, some Pro Pin drillings may require an extra hole for balance requirements.Please visit your pro shop professional for assistance in determining the best layout for your style and lane conditions. If additional questions, please consult the PRO PIN Drilling instructions included in every box or call Dyno Thane Technical Services at 1 800 369 4402 or email techstormbowli