It's called a heat diffuser, and it looks rather like a ping-pong paddle made of perforated metal.
Charmion, we call that a 'flame tamer', and I've been looking all over creation for one that doesn't have a wooden handle
On our camp stove (propane) I use the top cut out of a coffee can under the pot with perfectly satisfactory results. The problem now is that all my favorite coffee comes in plastic cans, so when I need a new lid I have to buy a can of something obnoxious exotic.
I've made fancier versions with double layer lids crimped together, but for my use the single layer is sufficient. Heat to dull red once, and all the plating is gone and it's just plain steel.
No handle at all, but everybody keeps a pair of pliers in the cutlery drawer, don't they? (Or you can use the "bottle tongs" that are handy with the deep fryer.)
I have one skillet - not cast iron - ideal for the eggs, that's just plain uncoated stamped carbon steel sheetmetal (about US 18 ga sheet). The handle has a steel "wrapper" to avoid heat migration, but someone with "tender fingers" might want a mitt/potholder if cooking more than a couple of pans of bacon.
Perhaps a hundred years ago this was a very common kind, and I've seen similar in photos from "California gold rush days;" but so far as I've seen nobody makes anything like it any more. I got mine several years ago at an antique shop, although I don't think it's really all that old. It was probably originally sold as a "camping skillet" just before alumin(i)um became the only thing available for that use.