Is this legal?

[millslot]

Sold a spare cash box on eBay and I'm supposed to ship to South Carolina? It's just an empty cash box but I'm not sure where the line is with this?

[mechanic]

YES!! SHIP AS A METAL BOX!! DO NOT SAY ITS FOR A SLOT OR ANYTHING ELSE. 99.99% OF PEOPLE KNOW NOTHING ABOUT SLOTS AND SHIPPING PARTS IS NOT A SLOT!! SOME BOXES I FOUND OVER THE YEARS WERE USED AT MACHINING CO. STORE ROOMS WITH DRILL BITS IN THEM ANOTHER HAD SCREWS. SO ITS JUST A METAL BOX!!!!!!!!!