The fixing is screwed in the pre-positioned installation into the Gypsum plasterboard and gypsum fibreboards flush to the surface. The sharp, self-tapping thread enables a secure, positive fit fixing. This achieves a high load-bearing capacity. The fischer GKM can hold wood, sheet metal and chipboard screws from 4 to 5 mm thickness as well as different hooks and eye screws. Consequently, it is universally suitable for fixing e.g. lights, electrical installations and fitting accessories securely and quickly.