The fischer cavity metal anchor HM RH is a versatile cavity fixing with round hook for all panel building materials. The fixing is set with the fischer installation pliers HM-Z 1 in the pre-positioned installation. The fixing is pulled in the cavity against the board building material with the pliers. In this case, the expanding arms swing open and press onto the reverse side of the board. The cavity metal anchor HM RH is suitable for fixing lights or flowerpots.