SureLino - WBSW screw ETA approved. 1. Secure Insulation in place.2. Drill through the insulation and into the masonry with the 5.5mm dia SDS drills to the desired depth.3. Push the SureLino fixing into the hole in the insulation and push home.4. Drive the screw into the hole in the SureLino fixing using the 350mm long screwdriver bit.5. Drive the screw into the masonry until the SureLino fixing head has compressed the insulation slightly. Approximately 5x fixings per m2. Applications For fixing through insulation into flat roofing.For fixing through insulation into timber decks.For fixing through insulation into flat concrete and masonry. Please note: This is product is the fixing only and does not include the washer.