The ball still has finger inserts. The thumb is drilled for an interchangeable insert.
Roto Grip No Rules Bowling Ball 15 lbs Preowned
Roto Grip GEM - Used - 15 lbs - No Thumb
Roto Grip Attention Star - Used - 15 lbs - No Thumb
Original Roto Grip Idol - User - 15 lbs - No Thumb
Roto Grip Magic Gem bowling ball 14LB 3OZ No Holes LRG Core 2000 Grit Abralon
Roto Grip RockStar Bowling Ball - - 15 Lbs NO THUMB LESS THAN 20 Games
