Collective clamp made of metal, ensuring a high degree of mechanical stability, also in case of fire. Halogen-free, does not burden the environment in case of fire. Also approved as a non-normative solution to maintain the function of electrical installations according to DIN 4102 part 12. Fireproof screw anchor [mm]S 6x50 included in the set. Including fire screw anchor. type [mm]S 6 x 50