The fischer gypsum plasterboard fixing GKM S K is made of metal. When in pre-positioned installation, the plug is screwed in either manually or with a cordless screwdriver so that it is flush to the surface in gypsum plasterboard. No pre-drilling is required with single planked gypsum plasterboard panels. With gypsum fibreboard and double-planked gypsum plasterboard panels pre-drilling should take place with a Ø 8 mm drill. The fischer GKM S K is fully delivered with a chipboard screw with a countersunk head. It is therefore universally suitable for quickly and safely mounting lights, electrical installations, and interior accessories.