They are silcone around the edges for a good seal I think, and maybe to help go around pans with pour spouts. The middle screen is metal and the handle is both metal and substantial. Hubby is concerned that maybe handle will heat up, won't know until we try.
For non-Costco members, here's a short instagram video showing them:
https://www.instagram.com/reel/DVcMpmdjkYF/
When I do my review/after using them, I should probably take a side by side picture of my current flimsy 10" one with the partially melted handle.
We do have a convection/air fry oven option and we use it a lot, but sometimes there is just no beating frying in oil/fat.