The present invention relates to a locking arrangement for a leg adjustable in length, more specifically a lightweight leg made of profiled tubes and provided with a locking between the hollow tubings by a movable locking pin (5). The invention essentially constitutes a particular designed sleeve adapted and fixed to the outer telescoping profiled tube or an outer hollow tubing (1) and the selectively placeable locking pin (5) to be inserted into previously prepared through holes (20) in the inner telescoping profiled tube or an inner hollow tubing (3). The sleeve (5) is having at a lower portion an inner ridge forming a locking edge (16) for a locking reception of the locking pin (5), the ends of which are protruding from an opposing pair of holes (20) in the inner telescoping hollow tubing (3).