The fischer frame fixing FUR-SS consists of a fixing sleeve made of high-quality nylon and a hexagonal screw made of zinc-plated steel. The FUR-SS is set in the time-saving through-type installation. When driving in the screw, the teeth expand in the solid building material and against the drill hole wall. In hollow building materials, the teeth expand through the solid part of the block and form an undercut in the cavity. The fischer frame fixing FUR is suitable for securely fixing squared timbers, gates, and doors in all building materials.