Berkley PowerBait makes novice anglers good and good anglers great. Berkley scientists have spent over 25 years perfecting an irresistible scent and flavor, the exclusive PowerBait formula. PowerBait Power Wigglers don't need to be refrigerated, making them more effective and easier to use than waxworms or larvae. Fish love PowerBait so much that they hold on 18 times longer, giving you the time and confidence to feel more bites, set more hooks, and catch more fish.