(patented) Stainless steel fastening kit for 2-wing MECHANICA hinges on flat profiles, with: 2 zamak counterplates 20×11 mm, 4 stainless steel special screws for counterplate fastening M8x28, 2 stainless steel socket head cap screws M4x16 for cover fastening, 1 stainless steel grub screw M6x8 for cam bushing fastening, 2 stainless steel leaf springs.