Hammer Spawn Bowling Ball The Hammer Spawn was built for the competitive bowler who demands a strong asymmetrical ball that is reliable when lane conditions change. Where many aggressive solids start to lose control once the pattern breaks down, Spawn is built to hold readability, continuity, and versatility even deeper into blocks. The HK22C² Solid coverstock coupled with more stable asymmetric core dynamics, Spawn delivers strong midlane traction without burning up too early, allowing bowlers to move left, open up their angles, and still see powerful motion through the pins. Performance Level: High Performance Color: Black Core: Gauntlet Core Type: Asymmetrical Core Coverstock: HK22C² Solid Cover Type: Solid Reactive Finish: 500, 1000 Siaair Micro Pad Lane Condition: Medium to heavy oil Weights: 12 lbs. - 16 lbs. RG: 2.517 (15 lbs.) DIFF: 0.050 (15 lbs.) , INT DIFF: 0.012 Reaction: Strong overall hook Warranty: Limited 2 Years Warranty