Grey fastening clamp made of plastic/polypropylene is suitable for simple and precise fastening of steel armored pipes in accordance with DIN 49020 and heavy insulating pipes in accordance with DIN 49016. During assembly, assembly corrections can be made using a 6 mm impact dowel or wood screw through the slot. The fastening clamps can be inserted into C-profile rails with a slot width of 11 mm and can be attached to almost all standard pipe clamps. Instructions for use 5 mm hole: Impact assembly 5 mm nail dowel, screw assembly or assembly on M6 thread Instructions for use 6 mm hole: Impact assembly 6 mm nail dowel, screw assembly (head diameter 8 mm)