The fischer insulation fixing FID is a fixing for mounting lightweight components in plastered and un-plastered insulation panels made of polystyrene and polyurethane. The fischer FID can be set either by hand, or with a cordless screwdriver. The special spiral thread taps itself in the insulating board. Components such as letter boxes, lamps or motion detectors can be mounted using a 4,5 to 5 mm screw.