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Hammer Envy Bowling Ball | BowlersMart Hammer Envy Bowling Ball The non-Hammer fans will have ball envy when they see this new Hammer ball out-hook and out-strike their balls. The new Hammer Envy was designed to be the strongest Hammer ball ever created. The Launcher core has both a flip block and our exclusive radial disc technology; these components move mass away from the center creating an increased imbalance for a stronger reaction throughout the lane.