Universal Plug | App8555 Pack of 48 Size: 30 x ∅ 7mm Rawlplug Brown Plastic Wall Plugs 7Mm Card Of 48 | App8555 The Rawlplug Uno Plugs are a truly universal plug which fixes into any wall, ceiling or floor. Suitable for use in: Concrete, brickwork, stone, blockwork, plasterboard. It has a unique design with expansion throughout the length of the plug. It expands at the top giving instant grip. Anti rotation features prevent spinning in the hole.