Keep cardboard box flaps folded down and out of the way, so it's easier to pack heavy and difficult-to-maneuver items. Because you're not reaching over the flaps, filling boxes is more ergonomic and less strenuous on your body. These clips are also useful for boxes that move on conveyors because they keep flaps from sticking out and add weight so the box stays in position.

Aluminum clips are larger and stronger than plastic clips, so they’re good for use on large-capacity cardboard boxes. They’re also heavier and less likely to crack or break from repeated use than plastic clips. Even if they’re run over by a cart, they might bend but they’ll still be usable, unlike plastic clips.

Hangable clips have holes to keep them on racks and carts where they're frequently used, so they're on hand when you need them.