Emits a thick, dense, suffocating smoke into the rodent burrows. Effective on gophers, moles, woodchucks, Norway rats, skunks and ground squirrels. Eliminates secondary poisoning concerns. Effective, quick, reliable control product for gophers, moles, woodchucks, rats, skunks and ground squirrelsSmoke penetrated deeply into tunnelNot a poison, no secondary effects