2 variants; 70 mm and 40 mm, 2 weight classes (A and C), opens in both directions, free swing (apart from the -10 or +10 degrees from closest hold position, at every 90 degree angle), 4 Extra strong ...

Doors are part of our daily routine, opening and closing so naturally that we rarely consider how they work. That is why, when discussing innovations in their design, many might think, "If it ain't ...