To Suit Screw Size: 4 - 6 mm Drill Diameter: 7 mm features: A truly universal plug which fixes into any wall, ceiling or floor, Suitable for use in: Concrete, brickwork, stone, blockwork, plasterboard. Unique design with expansion throughout the length of the plug. Expands at the top giving instant grip. Anti rotation features prevent spinning in the hole. Screw head size. Typical Applications: - Shelving and cabinets - Suspended ceilings - Switch boxes - Trunking and cable trays - Boilers - Water heaters and radiators Pack of 96 plugs