The hinge body is not made of aluminum, but only made of gray plastic, and even the cover under which the glands disappear is only (silver painted) plastic. The 7mm-square bolts are available for most window too long and must be shortened individually with the steel saw, and the file (but is not a problem, better long and cut too short and not to use it). In my case, the centering domes have also not fitted on the inside and were away from me with a small saw and a utility knife. The screws (M5x50 with Senkkkopf) were in my case also too long and were shortened individually by me by steel saw and tappers. The function is great though (the handle snapped every 45 degrees with a slight clacking a clean and conveys a precise feeling).
