Wood-post extender insulator with nails. Extends fence wire 5” from post. Protects permanent or damaged fences. Use with all fence wire and poly rope. Not for use with poly tape or high tensile fencing. Fast, easy wire insertion. Reusable. Raised boss for easy removal. Built-in ribs keep insulator from twisting. Ultraviolet stabilizers resist weathering. Simple one-nail installation. Made of plastic with a yellow finish. 25 in a package.