Swivel Coupler. 360 Degrees of Movement. High Tensile Aluminium. 35mm Half Couplers. Black or Silver FinishSWL: 100Kg. The Atom Swivel Coupler provides a firm fixing between adjacent bars whilst allowing 360 degrees of movement. Manufactured from high tensile Aluminium Extrusion.. clamp-doughty clamp-half coupler-truss clamp-lighting clamp-swivel clamp