This Softbait was engineered with a bubble head, rigid body and an extreme thump tail action to cause fish to react and bite. You can say the Thump Tail Shad drives fish "Crazy!" The Thump Tail Shad was tested for 8 months in 2015, before being approved and then going into production. During testing, the Thump Tail Shad proved effective at catching Crappie, Bass, Bluegill and White Bass. Engineered, tested and proven to catch fish!