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 a set of ten pins arranged in a triangle. The choice of ball can greatly affect a player's performance, as different materials and weights can influence the ball's speed and spin.