Rustpot
M Frame Lover
We have one at work that is handheld, you just pilot the center, run the thread rod through, run on the die holder, line it up, and out pops a nice hole. It's not good under say, 12 gauge, but I think the lid would be fine. The walls may be a touch thin. And we only have a half dozen shapes/sizes. But the electrical enclosure shop may have one better for thinner walls, or can support the surrounding metal. They can really swiss cheese metal and it gets pretty flimsy, plus they have a ton more sizes for random standard plugsets and connectors that we never have a need for.
