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Description

The invention relates to a cramp iron for the fixation of formwork for concrete supports. The cramp iron comprises four profiles in the form of rectangular pipes (1 to 4) that can be connected to each other to form a frame, of which at least two comprise first and second pipe sections (such as 1a, 1b), which can be inserted into each other in a telescoping manner and displaced relative to each other. The pipe sections (such as 1a, 1b) are provided with borings (5), which are equipped to receive securing elements (6).

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