(patented) Stainless steel fastening kit for 3-wing MECHANICA hinges on thermal break profiles and stepped profiles, with: 3 zamak counterplates 14×14 mm, 2 stainless steel special screws for counterplate fastening M8x28, 3 stainless steel socket head cap screws M4x16 for cover fastening, 1 stainless steel grub screw M6x8 for cam bushing fastening, 3 stainless steel leaf springs.