Zareba Fi-Shock IWNY-FS Slant-Nail Wood Post Insulator, Yellow

For fastening electrified wire to wood posts without losing energy through the post. Extends wire 2-1/2 in from wooden posts. For 9 to 22 ga high tensile steel wire and aluminum wire, all polywire (both regular and heavy-duty) and polyrope of diameter up to 1/4 in. Comes with a double headed nail.