The pre-mounted fischer construction element saddle flange SF Clix 31 securely connects the mounting rails FLS with the substrate at an angle of 90°. The pre-mounted element saves time and costs. The fastener in the SF Clix and the precise saddle enable a safe and secure installation. The stable base plate of the SF Clix 90° with slots at 90° makes fixing to the substrate with plugs or anchors easier. The galvanized zinc version is suitable for installation in buildings.