Responsive Power Through the Mid-Lane The Hammer Effect bowling ball combines a polished pearl reactive cover with an asymmetric core to create a clean front-lane read and a strong move through the middle and back of the lane. It is a high-performance option for experienced bowlers who want a defined motion on medium-to-heavy oil. Its HK22 Cohesion Pearl coverstock is designed to clear the front part of the lane before responding strongly to friction. The four-color maroon, blue, black, and purple design gives the Hammer Effect ball a distinctive look that matches its bold reaction shape. Built Around the Huntsman Core The Huntsman asymmetric core helps the ball rev, creating an aggressive mid-lane and backend response. An asymmetric core has an uneven shape that gives drillers more options for shaping the ball’s reaction. Bowlers who want a simple explanation can read more about bowling ball cores. The factory surface uses 500, 1000, and 1500 Siaair followed by Factory Compound. This polished finish helps the Hammer Effect ball retain energy while still producing traction when it reaches the breakpoint. Surface adjustments can change how early the ball reads, so a pro shop should match any changes to your speed, release, and usual lane conditions. Complete your lineup with one of our straighter spare bowling balls. You can also compare more bowling balls for sale or protect your equipment with our bowling ball bags.