The Fischer frame fixing screw, type FFS gives stress-free stand-off fixings without the use of additional plugs. The continuous thread in the frame and masonry ensures that the fixture cannot be pulled against the building material. Distortion of the profile will therefore not take place, either during or after installation. The distance is also maintained when loads are subsequently applied. The long screw length makes exact positioning easy. Suitable for: Concrete, solid brick, sand lime solid bricks, preforated bricks, sand lime preforated bricks, hollow blocks, solid pumice, aircrete, natural stone etc. For fixing of: Window and door frames made of wood, metal and plastic, window brackets. Advantages. Cost reduction with simple, time saving installation. Long lasting and stress free stand off fixing. High load bearing with small drill hole diameter. Universal use for all common building and frame materials. Tapered lead-in thread for easy attachment. Easy turning action with smooth hardened screw surface and slim thread