Ready to start hooking the ballMove up from Plastic to Urethane coverstock technology Compared to Plastic, Urethane coverstock technology increases traction and hooking action in the oil, and Urethane coverstocks can be sanded or shined to create large differences in hook potential. The Groove Urethane Cranberry Pearl outperform and under price the competition and are recommended for medium to drier lane conditions. Plastic slips. The Groove grips. And grip is exactly what you need to improve your game. When you're ready to step up from plastic, get in the Groove.Product Type Bowling Balls