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 Includes 2 x DS150 Cases This is a Bare Empty Case - It does not Include a Foam Insert or Organizers