can lock box be of combination lock with numbers

I've seen people with them all they want to do is see that it locks when you put your take homes in

As long as its all metal it can combo or key lock

Yep, as long as its metal.

Can be a combo or key lock. But has to be metal. They have some for sale there but your going to pay more than what you would at Walmart.

I also believe it has to be metal unless they've changed that. They're always changing the rules. But I've seen people with combination lock boxes