Abstract: Disclosed is a sandow device having an elastic cable with a monoblock mechanism including a hook integrally connected with a joint base plate having two parallel longitudinal canals holding the ends of the cable. The canal located closest to the hook holds the stretched end of the cable while the second canal located closest to the exterior receives the free non-stretched end. The two canals are separated by a partition which has at its upper portion a V-profile gap whose point is directed toward the bottom of the mechanism. The exterior canal further has disposed therein a means for maintaining the elastic cable which may be in the form of a plurality of parallel flanges.