I got these on a lot of floor lamps (can you image the horrible shades that were facing down!) but they appear to be Rejuvenation parts from maybe 15 years ago. One is clearly the raw unfinished brass you used to be able to buy from the restoration department and the other 2 are Matte Antique and Burnished Antique finished. The Matte piece has small splits (shown in photo 2) that don't reach the fitter screw rivet so the piece is usable/stable.