Gravity-lock, height-adjustable shelving, object support and hanging system

A method of making an apparatus comprising:

• a. providing at least one vertical support element having an outer diameter A;
• b. providing at least one support structure comprising at least one gravity-lock slider comprising a bore therethrough, said bore comprising an inner diameter slightly greater than A, such that said bore through said slider accommodates passage of said rod through said slider;
• and
• c. providing at least one appendage attached or attachable to said slider, wherein said appendage extends substantially horizontally from the point of attachment to said slider.

A kit comprising:

• a. at least one vertical support element having an outer diameter A;
• b. at least one support structure comprising at least one gravity-lock slider comprising a bore therethrough, said bore comprising an inner diameter slightly greater than A, such that said bore through said slider accommodates passage of said rod through said slider;
• and
• c. at least one appendage attached or attachable to said slider, wherein said appendage extends substantially horizontally from the point of attachment to said slider.