Abstract: A locking arrangement for telescoping tubes including an outer elongated tube with a radially inwardly projecting lock seam longitudinally extending along the length of the tube, and an inner elongated tube telescopically being received within the outer tube. The inner tube includes at least one integral radially outwardly extending projection formed as a deformation of the wall of the inner tube. The projection is such as to be able to be arranged in a clearance fit relationship so as to permit axial sliding of the tubes relative to each other, and upon relative rotation of the tubes, to adjust the projection in an interference fit whereby the inner tube becomes eccentric with the outer tube and is jammed in a locked position within the outer tube.