Brunswick Quantum Bias Pearl Bowling Ball SHSRPJWO XL This core features DOT (Durability

This core features DOT (Durability Optimization Technology) and DynamiCore

large and extra-large

(2) Large 4 Wheels for Increased Mobility and Stability

This tool is used to find a bowler's axis point

Brunswick Quantum Bias Pearl Bowling Ball SHSRPJWO XL This core features DOT (DurabilityBrunswick's successful relaunch of the Quantum product line continues with the Quantum Bias Pearl. This bowling ball features high density Quantum Mushroom High RG Asymmetric cores along with a thicker urethane coverstocks. This thicker coverstock offers durability, longevity, and massive hitting power. This ball is unique in that each core has a unique design to compensate for the gross weight of the ball, the core's dynamics, and the balls hook