The metal cavity fixing HRM 4-38 with truss head (PH2) is very versatile for fixings on boards like gypsum plasterboards, fibreboards or chipboards, but also for cavity ceilings. Its advantage is that after installation, the arms of the anchor expand over a large area behind the, thus reliably ensuring high load values. For a comfortable, controlled and optimal installation the usage of the installation pliers MZA 100 is recommended. The assembly pliers MZA is particularly helpful when installing large quantities of fixings and saves both time and money. Alternatively, installation with a cordless screwdriver or a screwdriver is possible. Finally, as a metal plug, the HRM is not flammable according to DIN EN 13501-1, class A1.