Vevor's semi-truck step tool box combines heavy-duty structure, safe steps, and secure storage in one versatile unit. Crafted from high-strength aluminum alloy, it supports up to 441 lbs. to ensure stable entry and exit for drivers, and features a spacious storage interior with a lock and keys. The aluminum construction offers excellent corrosion and rust resistance, and rubber sealing strips effectively block out rain and dust. Equipped with a stainless steel T-handle lock and keys, this side storage step box provides enhanced security for your belongings.