Shallow dof is fine, but I honestly can't tell what's in the background, and I wish I knew what it was. Good idea & good shot; the screws on the quarter should be more in focus, in my opinion.
Beautiful image. The depth of field speaks for itself. The lighting is great and the texture at the front works really well against the metal. This image gives a real sense of wanting to be careful not to bump the table.
I guess this meets the challenge but if you open up your computer you will find screws that make the ones on the quarter look huge by comparison. Original idea though, the only screws in the challenge. Plus, I don't like the blurry background.