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Rutland Easy Drill Wood Screw Insulator 20 Pack Twice as easy to screw in as standard supports - the wood is ‘cut’ not ‘displaced’. No need for pre-drilling for hard wood. Far less fracturing in wood when screwed in. Best possible insulation properties. Material: impact-resistant plastic. With short galvanised support Ø 6mm Suitable for: Polywire, Rope & Tape up to 10mm

