Engineered plastic side clips allows stack ability with other boxes. When carrying the toolboxes by hand, they can also be fastened together, allowing them to be carried as a stack. Heavy duty metal latches and hinges for added durability. Bi-material comfortable top handle is easy to grip. Locking side handles offer alternative lifting and easier maneuverability. Durable 4mm PP structural foam plastic for high impact protection. IP65 - Dust tight and water jet resistant due to high performance seal in the lid. A pressure relief valve enables equalization of the pressure inside and outside the unit. Padlock eyes provide lockable security. This is a Bare Empty Case - It does not Include a Foam Insert or Organizers.