Ten-pin bowling regulations, identification letters and numbers, and general wear from normal use. For much of the history of bowling, bowling balls were made using a three-piece construction method. Starting in the mid-1990s, however, most manufacturers switched to a two-piece method. In response to these innovative ball designs, the American Bowling Congress placed further restrictions on the technical characteristics of the ball such as the radius of gyration and hooking potential. A game of bowling consists of ten frames. In each frame, the bowler will have two chances to knock down as many pins as possible with their bowling ball. In games
Bowling ball all down with a single roll. Five-pin bowling balls have no finger holes and are between in diameter. They weigh between . The smaller size and lighter weight of the balls allows bowlers to hold the ball in the palm of their hand when bowling. The ball used in candlepins has a maximum weight of , and has a maximum diameter of , making it the smallest bowling ball of any North American bowling sport. The nearly identical weight of the ball, when compared to that of just one candlepin, tends to cause rapidly delivered balls to sometimes bounce at