Rawlplug WHO Countersunk Frame Fixing Screws offer a user-friendly and time-efficient fixing solution with no additional plugs required. These screws feature a countersunk head, are made of hardened steel, and are electro-zinc coated. They impose less stress on the substrate during installation due to the absence of expansion force, and their small hole diameter allows for high loads. These screws are easily removable for temporary works and are suitable for use in pre-drilled 6mm diameter concrete, full and hollow bricks, stone, and structural clay tile. They can also be used without pre-drilling in aerated concrete and timber. Applications include fixing door and window frames, suspended ceilings, and lightweight steel angles. Each pack contains 30 screws.