Get hardcore with the Grind! Hardcore Hammer Grind features a new core shape with our legendary Violent Reactive Coverstock (Widow Cover) to give you a strong, but controllable hook on medium oil lane conditions.
RG / DIFFERENTIAL
Join our Hammer bowling team for a chance to win a Hammer ball of your choice! We will also send you information about our newest products and upcoming events and promotions. We give away one ball per month. No purchase necessary.