2x adjustable roof hook with an additional fastening plate, suitable for installing substructures onto roofs with plain tiled roof coverings. Roof hook is screwed into a wooden rafter. It has an additional fastening plate intended for adjusting the point of fastening in the transversal direction. Fastener element has the option of adjusting the height to match the height of the roofing tiles and the batten thickness with the adjustment range of 7 mm, as well as the option of adjusting the height of the supporting element with the adjustment range of 25 mm, which is intended to level out the uneven parts on the roof. In a set together with fastening bolts.