Our most popular heavy duty letter/legal storage box - strong, dependable, portable, and stackable!;Multi-layered corrugate with double bottom, triple end, double side construction offers up to 85% more stacking strength than basic letter/legal boxes for maximum stackability.;Easy FastFoldTM One Step Set-up saves assembly time while the reinforced, tear-resistant hand holes make the box comfortable to carry.;35% deeper lift-off lid locks into place for high security storage.;10 x 12 x 15ﾃつ