Tool container system

A tool container system comprising:

• a first tool container including
• a first base having a first bottom wall and a first peripheral wall coupled to and extending upward from the first bottom wall, the first peripheral wall including a first front wall, a first rear wall generally parallel to the first front wall, and a pair of first generally parallel sidewalls extending between the first front wall and the first rear wall;
• a first cover pivotably coupled to the first base,
• a first hinge coupled to the first cover and the first rear wall of the first base, the first hinge pivotably coupling the first cover to the first base;
• a first locking projection or recess coupled to one of the first front wall of the first base or the first cover opposite the first hinge, and
• a first latch coupled to the other of the first front wall of the first base or the first cover opposite the first hinge, the first latch moveable between an unlocked position in which the first latch is disengaged from the first locking projection or recess and the first cover is pivotable relative to the first base between a closed position and an open position, and a locked position in which the first latch engages the first locking projection and recess and the first cover is locked to the first base in the closed position;
• and
• a second tool container that is smaller than the first tool container and stackable on top of a portion of the first cover of the first tool container, the second tool container including a second locking projection or recess, wherein, when the second tool container is stacked on the first tool container, the second tool container is lockable to the first tool container when the first latch is moved to the locked position to simultaneously engage the first locking projection or recess and the second locking projection or recess;
• and
• a third locking projection or recess coupled to at least one of the first sidewalls of the first base and configured to be releasably engaged by a second latch coupled to a third tool container to lock the first tool container to the third tool container.