Specially designed double clamp or swivel coupler of mixed duty category as its one half goes to 60mm (2.36") tube and the second to 50 mm (2.0") one. It opens the possibility to combine heavy duty tubes or trusses TT104, GS910 with the most standard trussing series e.g. FT, PT, LT, Bolted truss etc. The maximum loading capacity is 750kg (1653 lb). It is also possible to rotate each half of the swivel coupler to different angles, which adds other application possibilities to this gadget.