The Adjustable J-Hook is a heavy-duty two-part picture hook that permits height/level adjustments without having to remove the item hung on it from the wall. J-Hooks are installed with two (2) 1 7/8" x 13 nails per hook and/or the optional screws & anchors.
The lower section of the J-Hook moves up or down by adjusting the hex nut on the threaded bolt that connects the two parts. The upper section of the hook is designed so that you can make this height adjustment while the hook is under load on the wall by turning the head of the connecting bolt with a screwdriver inserted through the opening on the top side of the J-Hook.
There is approximately 3/4" adjustment capacity on a J-Hook, so installation of the hooks on the wall need not be perfectly level.
J-Hooks can be used in conjunction with wired picture frames, but they are more commonly employed to hang pictures directly on a pair of D-Ring Hangers or Strap Hangers that have been attached vertically to the back of a picture frame at the top corners. See the instructions below for more details on attaching picture hangers used in combination with J-Hooks.