Rutland Easy Drill Wood Screw Ring Insulator x 90

These wood screws are two times easier to screw in than standard supports. There is no need for pre-drilling for hard wood and there is far less fracturing in wood when screwed in. They give the best possible insulation properties. They are made from plastic with a short galvanised support and are suitable for poly wire, rope and tape up to 10 mm. The 90 piece box comes with a free screwdriver bit for putting the insulators into wooden posts.