A stackable spool cable manager assembly is disclosed which comprises a plurality of like cable manager spools. The cable manager spools comprise a locking mechanism such that the cable manager spools can be stacked and such that when locked together a cable support arm of each the cable manager spools is offset from the others. A magnet is also provided, for example for securing to a bottom ne of a stack of cable manager spools such that they can be secured to a metal tray or the like.