VEVOR NEMA Steel Enclosure, 16 x 16 x 6\'\' NEMA 4X Steel Electrical Box, IP66 Waterproof & Dustproof, Outdoor/Indoor Electrical Junction Box, with Mounting Plate

If you are asking if this unit has knock outs in the bottom, the answer is no.

Roughly 1.5" x 5" I'd guess, but I didn't take exact measurements before bolting the cover plate on. It does punch pretty nicely with a standard electrical conduit punch set, but putting your own conduit knockouts on it.

I see Rust starting within a few weeks.

It’s closed

The box comes with hinges on the left side. There are 2 holes on the right side of the box for hinges, if you decide to hang the door there. They are plugged with plastic plugs.

If the box is to be mounted indoors then you can mount it with the hinge on the right or left.