CFT 3.5 is the next evolution in Chemical Friction Technology. The CFT 3.5 coverstock has a higher friction factor than the original CFT 2.5 to improve the overall hook, down lane traction and increase the entry angle. The proven twocomponent asymmetrical IBlock™ core enhances the CFT 3.5 coverstock to create maximum forgiveness, strong entry angles and versatile drilling layouts. With its 4000grit micro pad finish, the C (System) 3.5 offers a higher friction factor and increased response time to friction alternative than the original C (System) 2.5. The new C (System) 3.5 is best used on mediumoily to oily lane conditions when a quicker response motion is needed to increase entry angle to the pocket. The C (System) 3.5 can be drilled using the standard drilling techniques developed for asymmetric bowling balls. Please visit brunswickbowling.comdrilling_information to view the drilling instructions for specific reaction characteristics and layout details. The unique core shape of each Brunswick ball is used for weights from 14 to 16 pounds. This approach to lightweight ball engineering provides bowlers with consistent ball reaction characteristics across this weight range. The same drilling instructions can be used for 12and 13pound balls. This is because Brunswick uses a generic core shape with an RG differential that is close enough to the 1416 pound shape.