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 (for inst. when applying insulating foam). The distance is also maintained when loads are subsequently applied. The long screw length make exact positioning easy. Suitable for: Concrete, solid brick, sand lime solid bricks, perforated bricks, sand-lime perforated bricks, hollow blocks, solid pumice, aircrete, natural stone, etc. For fixing of: Window and door frames made of wood, metal and plastic, window brackets.