This vertical lure is attracted with a jerk with the rod and then dropped again in a controlled manner. During the upward movement, the wider belly creates a high-frequency vibration that can be felt throughout the tail. In the sinking phase, the vertical jig tumbles seductively downwards if you find the right speed.
The high-frequency vibration when jigging is what makes the vertical jig so irresistible for catfish. 
The catfish are often attracted even from a great distance and provoked to attack. Due to the two hooks and the rather small bait size, missed bites are very rare. 
A robust powder coating reliably shields the metal and ensures that the bait is taken with less suspicion. The vertical jig also works excellently in combination with the catfish wood.