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. Ready to start hooking the ball? Move up from Plastic to Reactive coverstock technology. Compared to Plastic, Reactive coverstock technology increases traction and hooking action in the oil, and Reactive coverstocks can be sanded or shined to create large differences in hook potential. Reactive coverstocks also respond more aggressively to dry lane surfaces than Urethane coverstocks, increasing backend hooking action and hitting power.