a backing plate having a plurality of co-planar bars extending between co-planar side rails with slots between said bars, said backing plate including structure for enabling said backing plate to be affixed to the wall with said side rails in contact with the wall to provide a space between said bars and the wall; and

a hook for supporting the object, said hook including a body portion and a protrusion forming with said body portion a U-shaped receptacle for accepting an object to be mounted to the wall, a first hook retainer at one location on said body portion for removably fitting into a first said slot and extending behind at least one of said bars adjacent to said slot and into the space between said bars and the wall, and a second hook retainer at another location on said body portion for removably fitting into a second said slot disposed below said first said slot when said backing plate is affixed to the wall.