The Fischer hollow wall metal anchor HM-S is a versatile hollow wall anchor with a metric screw for all panel building materials. The anchor is installed using the Fischer HM-Z 1 installation tool in a pre-insertion method. With the tool, the anchor is pulled against the panel material in the hollow space. The expansion arms then fold out and press against the back of the panel. Alternatively, installation with a screwdriver or cordless drill is also possible. The Fischer hollow wall metal anchor HM-S is suitable for securing lights, towel holders, and curtain tracks indoors.