Pinned -[ HMM ]-

Cotter pins and magnetic hooks.

 

I set up a nearly identical arrangement of hooks about 1½ years earlier, just dropping hints in the tags without explaining what I did. Since magnetism is the theme this time around, I used a large washer, placed behind a sheet of matte board held at an angle, to secure the upper hook magnetically. Cotter pins were chosen to be unique; their low profile is a bonus.

Done