Please be reminded that, in accordance with the latest World Bowling Statutes and Playing Rules (as of September 2019), balance hole is NOT allowed from August 1, 2020 onwards.

World Bowling Statutes and Playing Rules (as of September 2019) stated that:

4.11.6 A maximum of five gripping holes are allowed in a bowling ball. The athlete must use each hole. Any hole, which is not used, is considered a balance hole (which are not allowed after August 1, 2020).

11.12.3 (Until August 1, 2020) One hole for balance purposes not to exceed 1 ¼ inch (31.8 mm) diameter. (Including the surface opening).

11.13.1 The following tolerances shall be permissible in the balance of a bowling ball used in sanctioned competition.

11.13.2 Weight more than 10 pounds (4.53 kg)

1. Not more than 3 ounces (85 grams) difference between the top half of the ball (grippingholes side) and the bottom half of the ball (side opposite the gripping holes).
2. (not valid on or after August 1, 2020) Not more than 1 ounce (28 grams) differencebetween the half of the ball to the left and the half of the ball to the right of the center ofgrip (side weight).
3. (not valid on or after August 1, 2020) Not more than 1 ounce (28 grams) differencebetween the half of the ball toward the thumb hole side of the center of grip and towardthe finger holes side of the center of grip (thumb/ finger weight).

11.13.3 For balls without a balance hole not more than 3 ounces (85 grams) between any two halves of the ball. A ball used without any gripping holes or indentations may not have more than 3 ounces (85 grams) of difference between any two halves of the ball.