Striking plate
A strike plate is a flat sheet steel with recess (s) or recess (s) into which the latch and, if applicable, the bolt of a door lock grip in order to keep a door closed or locked. At the same time, it serves as protection against wear and tear on wooden or plastic frames in order not to leave any permanent damage to a “door falling into the lock” due to the beveled side of the lock latch. It is usually mounted on the door frame or, in the case of double-leaf doors, on the inactive leaf. In the case of aluminum or steel frames , a separate strike plate is usually unnecessary. On older doors with box locks , instead of a strike plate, a lock shackle with the same function was found. This usually protruded a little on the frame.
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Wiktionary: striking plate - explanations of meanings, word origins, synonyms, translations
