The invention relates to a device for attaching an expandable member (4) to a profiled section (1a) which has an edge-related, longitudinally extending channel (1f) which includes a constricted edge-related, opening provided part (1c) and an inner part (1f) defined by wall-parts, with the aid of a rotatably expandable member (4) having clamping surfaces (4f') which face towards the inner surfaces or wall-parts of the inner part, these clamping surfaces being intended to be brought into firmly clamping engagement with the wall-parts of the inner part in response to rotational movement, among other things. The expandable member (4) is comprised of at least one spring element provided with legs (4a', 4b') and located on one side of a lever arm (3b) which generates rotary movement. The device can be used to connect two mutually adjacent panels together e.g. separate display systems.
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