Used to control small pests, does not harm lawns, plants, or trees. Will easily penetrate deep into burrows and tunnels. Releases sulfur gas that kills or forces rodents out hidden tunnels and burrows. Smoke enables deep penetration of burrows and tunnels (including other hard to reach areas). Perfect for moles, gophers, woodchucks, rats, squirrels, skunks and more. Only one 4ct left