New Ball Drilling Specifications

This year the new USBC ball drilling specifications go into effect. Every hole in the ball now requires the bowler to have a finger or thumb in it. No more balance holes and people who bowl without using their thumb cannot have a thumb hole. Additionally, those who do not use a thumb must have a marker on the ball that indicates where the bowler’s palm should be during the delivery. The link below contains a poster that explains this with images.

USBC Balance Hole Poster