Abstract: The disclosure relates in general to the connection art and in particular to the connection of two inclined tubes to a leg or other tubular piece in tables or similar articles. For improving the stability of such connections the ends of the two inclined square tubes extending above the prongs of the corner piece are obliquely cut such that their one side entirely conceals the corresponding side of the prongs and extends up to the seat and each forms an extension of the outer defining edges of the seat extending in the longitudinal direction of the leg or tubular piece in order, together therewith, to be held in abutment against the leg or tubular piece, the seat being designed to be urged laterally together with its extensions formed by the square tubes, against the leg or tubular piece substantially only along the defining edges and the extensions.