The fischer frame fixing FUR is made from high-quality nylon. When the screw is screwed in, the asymmetrically arranged lamella teeth expand evenly against the wall of the drill hole in the solid building material. In hollow materials, the teeth expand through the solid part of the block and form an undercut in the cavity. The unique functional principle enables an even load application without extreme expansion pressure and simplifies installation even in the case of an unknown mounting substrate. The FUR is offered in diameters of 8 mm and 10 mm up to a fixing length of 230 mm with safety screws made from zinc-plated steel and stainless steel and with a countersunk head, hexagonal head or hexagonal head with moulded washer. The European Technical Approval for the FUR 10 offers added safety.