I have a flexible lamp on my sewing table. The base that came with it was broken so I had to replace it. I found this set of 2 to be metal, not plastic. At first I didn't think I needed two, but the more I thought about it, the more I realized how nice it would be to be able to move the lamp around without taking the whole clip base with you. Often when I'm sewing or crafting, the lamp doesn't reach the area I'm working on. It's nice to just pick up the lamp and put it at the other end of the desk. in the second clamp base. I love it! They are also much better made than the cheap plastic parts that came with my lamp.