For large windows and for portieres on doorways the 3/4″ rods are preferable. Can span approximately 80″ between supports.
Brackets are sold by pairs. The projection is measured from the surface upon which the bracket is mounted to the back of the rod. On all brackets, the “barrel” unscrews and slips over the end of the rod. Rods are cut to size – see the rod page for measuring information.