Fix the separate wall bracket then the hoop handle fit into it to form a static litter colleting station. The hoop is hinged so the neck of the sack can be trapped between the top and bottom sections and this holds it wide open. The hoops handle has finger grips so the hoop and bag can be used as a hand held collection unit when collecting litter on the move. Made from polypropylene the hoop is very easy to keep clean.