In most cases it really can be a freestanding bike stand.
When you find that you do need more stability, be sure to use a screw which is long enough to give a good bite into the stud. The included screw is too short for going through some wall surfaces and will not reach far enough into the stud.
Assembly is easy.
2-bike freestanding rack stand
Independent adjustment arms
Vinyl-coated cradles protects bikes; no bolts, screws, or fasteners required
79 by 26 by 19 inches (height by length by depth); 20 pounds