Oncore Caliber Golf Balls PLAYER PROFILE: the Caliber is built around patented hollow-metal core technology that was so innovative, causing the USGA to rewrite their rules for allowable ball construction; ideal for accuracy, and for swing speeds under 100 mph COMPRESSION: An 80 compression ball  our softest metal core product yet; with 80 compression, with a 392 soft surlyn dimple pattern DISTANCE: Great distance for low to medium swing speeds. With a 392 dimple pattern, our SoftCell mantle layer technology, and our unique 0.900-inch hollow metalcore SPIN: Exceptional spin properties both off the tee and around the green and fairway. Our design produces rifle spin while reducing side spin, allowing the ball to travel along a straight trajectory  akin to a bullet leaving the barrel Conforms with USGA & R&A rules: CALIBER and was created to meet both USGA rules and R&A guidelines