Dog Hook with Keyhole Slot

Added a keyhole slot onto danieloliver's Dog Hook to hang it from a screw or nail for increased mounting strength.

As Daniel said, you can use this to hang things behind the bathroom door, but I say go all out: hang it in front of or on the bathroom door. Pretty sure this won't work on any door other than a bathroom door, as the base model only promises to work behind a bathroom door. I'll update this if I can get it to work on any other doors.