It is a sturdy and generally mobile metal part with various uses. The most popular is the caller to knock on the doors, like a piece attached to it by a hinge that allows you to beat it. It can also be fixed to the wall with a hoop through which to pass the cavalry reins and thus tie it so that it does not escape. In the windows is a moving bar with a hook that serves as a lock so that they do not open. It comes from the Andalusian Arab 1575; 1604; 1590; 1576; 1617; 1577; ( aldbb ) with a dubious translation of "the lizard"; today in Arabic means "the lock or latch".
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