Abstract: A reversible fastening device (50) for reversibly fastening connecting means (51) connecting a first (52) and a second member (53); the connecting means (51) being housed entirely inside the first member (52); and the device (50) being characterized in that, at a first reversible stage, the connecting means (51) are moved from a withdrawn position to an extracted position projecting with respect to the first member (52); and in that the desired reversible fastening of the connecting means (51) connecting the first (52) and the second (53) member is achieved in the extracted position.

Abstract: A device (1; 1′; 13″; 100; 150; 170) for connecting at least one lath element (13′; 13″), the device (1; 1′; 13″; 100; 150; 170) being characterized by having a main outer body (2; 101) formed in one piece from a first material, and at least one resisting element (15; 102; 155; 174) having connecting means (10′, 10″, 11′, 11″, 12′, 12″; 110, 111; 151b, 151d, 152b, 152d, 153b, 153d, 154b, 154d; 171a, 171d, 172a, 172d, 173a, 173d) for connecting the lath element (13′; 13″); the resisting element (15; 102; 155; 174) being defined by a number of parts (6, 7, 8; 151, 152, 153, 154; 171, 172, 173) substantially housed inside the main outer body (2; 101), and being made of a second material, other than the first material, for resisting mechanical stress.