Fi-Shock IWNY-FS Slant Nail Insulator, Yellow Fastens electrified wire to wooden posts without losing energy through the post Extends the wire 2 " from the wooden post For 9 gauge through 22 gauge high-tensile steel wire and aluminum wire, all poly wire (both regular and heavy duty) and up to " in diameter Comes with a double-headed nail Packed 25 per bag