Need a box for a ham radio project and it fits. I had to have a metal box for RF shielding. The metal is easy to drill and fairly soft. The sides taper slightly towards the hole, probably to help pop it out of the mold when it's done. It's not a problem for me, and if you don't look closely, nobody will notice. Keep this in mind when putting it in a drill press to make holes in the sides. I will buy more if needed!