Uniquely shaped fish tail generates micro-vibration and micro-wave. At the time of no sinker jerk, the tail grabs the water and applies the brake, realizing a swing with a small movement width. In addition, it appeals to the instinct of fish eaters with a quivering action. This quivering action is also very effective for down shots, Carolina rigs, and free rigs. At the time of straight retrieve such as jig head rig, the tail is pull-pull and slight vibration action. Also for swim jig and chatterbait trailers.