Sweeney`s 9012 Mole And Gopher Repelling Sonic Spikes 2 Pack Covers 15000 Sq Ft Sonic Spikes - Drive Moles And Gophers Away Unharmed And Without The Use of Chemicals Or Poisons. Penetrating Sonic Pulses Irritate Burrowing Rodents And Send Them Scurrying Away. Designed With A Convenient Battery Sleeve For Trouble-free Battery Replacement.