A joining member for hollow profile slats of extendable blinds, in one piece and preferably stamped from sheet metal which has a recess on one side and, on the opposite side, a joining member which fits into the recess of one of next identical unión, characterized in that the connection member has one or several extensions bent backwards in the form of a hook, and one or more safety elements, angled slightly towards the plane of the joining member and intersecting with the extension or extensions. (Machine-translation by Google Translate, not legally binding)
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