Final answer:
Most house balls are drilled for a conventional grip, suitable for casual or beginner bowlers, providing comfort and control.
Step-by-step explanation:
Most house balls, which are the bowling balls available for general use at bowling alleys, are drilled for a conventional grip.
This type of grip is where the bowler's fingers are inserted into the ball up to the second knuckle. The conventional grip is easier for casual or beginner bowlers, and it's designed to provide comfort and control when rolling the bowling ball.