Non combustible all metal fixings for multiple materials. No plug required. Fully compliant with the latest fire safety wiring regulations BS 7671:2008 from the Institute of Engineering and Technology. Approved by D-line, for use with the Safe-D Clip system. Fasten various fixtures directly to plasterboard, wood, concrete, sand-lime stone or brickwork. These are DeWalt Walldog Screws, 32mm in length with a CSK Head, sold in a pack of 100 and are Silver in colour.