(patented) Galvanized fastening kit for 3-wing MECHANICA hinges on flat profiles, with: 3 zamak counterplates 14×14 mm, 6 galvanized special screws for counterplate fastening M8x28, 3 galvanized socket head cap screws M4x16 for cover fastening, 1 galvanized grub screw M6x8 for cam bushing fastening, 3 pre-hardened burnished steel leaf springs.