What is the door fitting

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Door fitting is a collection of many elements that act as a door leaf-frame connector. The fittings include locks, door inserts, seals, hinges and, of course, handles. The handle is the most complicated part of door fittings and therefore should be of good quality and theoretically it should be able to serve for several decades. That's why the handles are made mainly of high quality stainless steel, which is solid and corrosion free.