An Art Deco base for an IKEA Tertial lamp (or similar). This includes a clip that slides over the clamp rod and keep the base from falling off while you're moving it around.
Read more about the piece at my blog: http://wp.me/p2hTaI-fY
Then slide the clip over the rod so that the flat part is towards the bottom. Then slide the rod into the base's horizontal hole, making sure the clip snaps around the tabs on the base.
Use as normal, but now with style.