Keil drive (1) with a sliding section (4),a sliding part (2) and a slider arranged between the sliding part (4) and the sliding part (2);which is movable in and out of a working position over sliding surfaces between a closed and an open position, the slider (3) being equipped with a position-changing device (10) for the production of either the working position or a mounting position; where a first stop (30) and a separate second stop (40) are provided at the slider (3), the device (10) is positioned in the working position of the wedge drive in such a way as to limit the first stop (30),when the wedge drive (1) is or is fully open according to its intended position and the device (10) is positioned in the mounting position in such a way that the second stop (40) is supported by the device (10).
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