Hammer 3-D Offset Attack Bowling Ball With a shiny, pearl version to the 3D Offset family, the 3D Offset Attack. The 3D Offset, released earlier this season, has been an excellent hit for Hammer; it brought back one of the most significant releases in bowling history and has been successful on the lanes. One of the most exciting things about the 3D Offset Attack is that it is Hammer’s first release with the new HyperKinetic 22 cover base. In this release of HK22, you’ll notice more rich and impressive colors and a cleaner and more responsive cover, which creates more area at the breakpoint, leading to higher scores. Performance: Upper Mid Color: Vibrant Blue / Navy Core: High Rev Offset Coverstock: HK22 - Neoflip 25 Cover Type: Pearl Reactive Finish: 500, 1000, 1500 Siaair /Crown Factory Compound Weights: 16-12 Pounds Lane Condition: Medium to heavy oil Reaction: Length with aggressive backend Warranty: Two years from purchase date