Stability at the time of landing is an indispensable function for crawling the bottom and making heavy use of hang-off. Therefore, a football-shaped head is adopted. First of all, it's pretty hard to fall down with just this. Also, perhaps because the worm is slightly above the head, the head, which was about to tilt, lifts up just by stretching the line (in other words, just by applying upward tension to the eye of the hook). .

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●Resin Tungsten