Brunswick Contra Bowling Ball Core
It’s a bird! It’s a plane! No! It’s the new DOT (Durability Optimization Technology) from Brunswick Bowling! The Contra Core is the first to feature this patent-pending technology that will allow an unrestricted drill area and more long-term durability for your bowling ball. The Contra core is the first to feature Durability Optimization Technology (DOT) – a patent-pending technology that creates an unrestricted drill area.