Plastic quarter turn shelf support

Claim 1

A MULTI PIECE PLASTIC SUPPORT MEMBER ADAPTED TO BE USED IN AN APERTURED PANEL WITH SAID APERTURE HAVING A CENTRAL SUBSTANTIALLY CIRCULAR PORTION AND AT LEAST ONE LATERAL RECESS, SAID MEMBER INCLUDING IN ASSEMBLY A SUPPORT ELEMENT AND A STUD ELEMENT, SAID SUPPORT ELEMENT INCLUDING A BASE ADAPTED TO ABUT SAID APERTURED PANEL, A CAVITY IN SAID BASE ON THE SIDE ADAPTED TO ABUT SAID PANEL, SUPPORT MEANS EXTENDING OUTWARDLY FROM SAID BASE IN A DIRECTION AWAY FROM SAID PANEL, SAID STUD ELEMENT HAVING A HEAD AND A SHANK, SAID HEAD ADAPTED TO BE COMPLEMENTALLY ACCEPTED WITHIN SAID CAVITY IN THE BASE OF SAID SUPPORT ELEMENT WITH SAID SHANK EXTENDING OUTWARDLY FROM SAID HEAD IN A DIRECTION OPPOSITE TO SAID SUPPORT MEANS ADAPTED TO BE COMPLEMENTALLY ACCEPTED IN SAID PANEL APERTURE, MEANS ON SAID HEAD FOR INDUCING ROTATION OF THE SHANK, MEANS FOR RETAINING SAID HEAD AND SAID BASE IN ASSEMBLED RELATIONSHIP, AT LEAST ONE LUG COMPLEMENTARY TO SAID APERTURE RECESS EXTENDING LATERALLY FROM SAID SHANK AND PRESENTING MEANS AXIALLY SPACED FROM AND IN OPPOSITION TO THE UNDER SIDE OF SAID HEAD, A SUBSTANTIALLY RIGID STOP MEANS POSITIONED ADJACENT ONE EDGE OF SAID MEANS AND EXTENDING UPWARDLY FROM SAID MEANS TOWARD SAID HEAD WHEREBY ROTATION OF THE SHANK AFTER TELESCOPIC ASSOCIATION OF THE SHANK AND LUG WITH THE COMLEMENTARY APERTURED PANEL CAUSES THE MEANS OF THE LUG TO UNDERLIE THE PANEL AND THE STOP MEANS TO LIMIT SAID ROTATION BY ENGAGEMENT WITH THE PANEL EDGE FORMING THE LATERAL RECESS IN THE APERTURE.