I need help Which is the best way to make a rectangular hole

how big hole?

how thick metal and plastic?

what material metal?

what material plastic?

what tools you have?

die punch

dremel for most of it, clean it up with a chisel/saw/file/snips

>>1131904

second die punch is something you should own if you plan on doing these kinds of things

Mark rectangle
Drill corners big enough to get saw in
Saw out sides
File to match line
???
Profit

If you want the cleanest edges and corners without deformation, a punch press with a custom die is the way to go. It's also terribly fast once you have the die made.

>>1131927
Never done anything else than this

>>1131899
Use a zip cut on metal.

>>1131899
i usally make a small hole with a drill near the edge of the rectangle, and then in the middle a large hole to start a cut with a jigsaw.
Then you can file the corners if you don't want them rounded.

>>1131899
Tape around it so the plastic doesn't crack, then use anything you want.

Personally I'd use the plastic cutter on my oscillating tool.