opposed surfaces of collar 12 and the inner telescopic part 11 to stop circumferential shifting prevented by the kinks or corners illustrated in the right hand half section of the fig2 is the 34 one part 34 embodiment of a slide mount 10 in accordance with the invention showing the front lower part of the mounting arrangement i e for example the front lower part of a collar 12 of an outer telescopic part as well as the inner telescopic part 11 mounted in the collar 12 it being the slipper 13 which provides for mounting the telescopic part 11 in the collar 12 the slipper 12 has an outer contour substantially adapted to the two opposed surfaces of the contour of the collar 12 and of the telescopic part 11 in the example shown the lower collar shape is kinked due to the wedge effect resulting between the inner telescopic part 11 and the collar 12 the slipper 13 is no longer able to slip out of place circumferentially once it has been inserted between these two parts i e it stays in place at its outer surface i e the surface facing the collar the slipper 13 comprises longitudinal grooves 16 extending perpendicular.