I don't keep my tools in a box they are on the wall if possible or in a drawer.
If I'm going somewhere and I need tools I have a couple of portable carry tool boxes.
The reason?I had a full set of snap on in a nice big roll around box. working outside in the driveway.
Went in to use the bathroom and when I came out i was minus thousandth of dollars. They just rolled them to a truck or van and push them in. Oh I do have a roll around at work. at least I wont be the only one to lose there.