I use a 5 gallon bucket drill a hole on both sides of the bucket drill a hole thru both ends of a water bottle. install a rod thru the holes thru the bottle make sure the bottle spins freely. put water in the bucket and peanut butter on the bottle. when the rat goes for the peanut butter the bottle spins and rat falls in the water and drowns. I have several set up around the property and catch 4-5 rats per bucket every night sometimes more