This was a submission for a photo contest with a theme of "circles", hence the title. I used window light, an overhead incandescent light, a halogen desk lamp with a white grocery bag over it to soften it, and a DIY diffused light panel plus a floor lamp I had to hold just so with my left hand to make the shadows as I pushed the shutter w/ my right. Camera rested on a stack of books. Very high quality studio equipment here...
Oh, an excellent 1920's style abstract view of an industrial object! When I was a child, I admired catalogue photographs, which, like this, were often of FINE aesthetic quality!