1. A STORAGE OR DISPLAY DEVICE COMPRISING A TUBULAR MOUNTING MEMBER AND A BRACKET MEMBER FOR ATTACHMENT TO AND DETACHMENT FROM SAID MOUNTING MEMBER, SAID BRACKET MEMBER HAVING A BEARING PART TO PARTIALLY EMBRACE SAID MOUNTING MEMBER, ONE OF SAID MOUNTING MEMBER AND SAID BEARING PART HAVING A PAIR OF LATERALLY SPACED AND CONVERGING SLOTS OR RECESSES, AND THE OTHER OF SAID MOUNTING MEMBER AND SAID BEARING PART HAVING TWO PROJECTIONS FOR ENGAGEMENT IN SAID SLOTS OR RECESSES, SAID SLOTS OR RECESSES AND SAID PROJECTIONS THUS CONSTITUTING COUNTERPART ENGAGEMENT MEANS, AT LEAST THOSE PARTS OF SAID SLOTS ENGAGEABLE WITH SAID PROJECTION BEING IN DIFFERENT PLANES, PRESSURE ON SAID BEARING PART ACTING TO WEDGE SAID PROJECTIONS INTO SAID CONVERGING SLOTS TO SECURE SAID BRACKET AGAINST ACCIDENTAL REMOVAL.