Fiberglass Offset 5/8" x 12"
This low-cost offset insulator can be driven directly into trees or freshly treated posts. A drive cap should always be used to install these. In harder posts a 5/16 inch pilot hole should be drilled. The fiberglass is a great insulator and much stronger than plastic nail-on offset insulators which often break in the first winter. A spring clip (F5S) is required to support the wire in the offset and is sold separately.