It is a humane, and highly effective deterrent for most animals, including cats, squirrels and herons and other pests in vulnerable garden areas. Simply place the ground spike into the earth to mount the repellent.
It actually work very well all animal scare to dead and no sign of coming back, Plastic spike not a good idea for hard ground. I prefer metal spike holder. nail the spike holder to the ground first then place sprinkler to the holder. Redesign for better