There are fixed type and floating type. Fixing is to put a lead pendant through the monster's back, put bait in the monster and throw it into the water, and the monster will float up through the buoyancy of the float. The lead pendant must be heavier than the buoyancy of the float and suitable for places with small water flow. Floating type does not need to throw lead, but directly throws it, which is suitable for stagnant water fishing grounds such as reservoirs. As long as there are silver carp, the bait rate is quite high.