The name comes from the intense "panic action" of a bottom knock. A prism scale is mounted inside the lure, the cross-sectional area on the ventral side is larger than that on the back side, and the center of gravity is lowered. The dive depth is around 1.5m for MR and around 2m for DR. There are 26 colors in total, and the back side has a firm gradation and the ventral side has a slight gradation so that the characteristics of each color can be seen while making the best use of the prism scale.