Our Handle Bowling Balls allow bowlers with physical limitations in their bowling hand to still bowl. They have a handle (much like a suitcase handle) that the hand can be placed under, allowing the bowler to use the hand hold the ball, rather than the fingers via gripping holes. The handle quickly retracts after bowler's release and well before the ball hits the lane. We use only urethane balls because urethane is strong enough to adapted for this purpose, while polyester balls are not. We machine them to accept our handle assembly and install the handle assembly.