A bowling ball is a heavy, spherical object used in the sport of bowling. Typically made of plastic, urethane, or reactive resin, these balls come in various weights and sizes to suit different players. Each ball has three holes drilled into it for the fingers, allowing bowlers to grip and control their throws effectively. Bowling balls are designed to roll down a bowling lane and knock down pins arranged in a triangular formation. The goal is to knock down as many pins as possible with each roll. Different types of bowling balls can create various spins and hooks, adding strategy to the game.