The Burger Coupler with 16mm socket (KCP-842B) is a lightweight and low profile professional coupler, constructed from high tensile aluminum extrusion. It has been developed for installations where load capacities of up to 110lbss (50kg) are required. It is designed to fit tubes with a diameter of 48mm-51mm (1.89"~2.0") for lighting fixing accessories, or related accessories of KCP-700 convi clamp.