Support rail folds while not in use. Allows versitility in positioning the rail - mounted to the floor, not the wall. Rail features a clamp with a large plastic knob that attaches it in the required position on the post. Spring mechanism on rail reduces effort requirred to lower and raise rail and holds rail up securly aut of the way when not needed. 44" high post is welded to a 10" x 6" floor plate, which must be securly fixed to the floor. 30"-long rail is 1 1/4" epoxy-coated steel tube. Hardware not included. Reccommended installation by a qualified professional.