one another the holding part has support flanges which can contact the outer sides of the webs the holding part is provided with at least one bore in which a pin carrying the clamping element is rotatably held such that as a result of its turning the clamping element engages at the inner sides of the webs and tensions the support flanges against the outer sides of the webs application_number US 13920402 A description a side wall 1 of for example the body part of a cupboard can be seen from fig1 and an extruded section 2 is connected to its edge the extruded section 2 made of aluminium for example has a u shaped section part 3 whose limbs are provided at their ends with inwardly directed bendings this u shaped section part encloses the edge of the wall 1 of the body part in a usual fashion adjoining the u shaped section part 3 the extruded section 2 is provided with another u shaped section part whose web part 4 is formed by an extension of the outer limb 5 of the first u shaped section part 3 the upper limb of the second section part is formed by the web.