Abstract: A tool pack has a shape retaining shell enclosing a tool protective compartment. The shell includes first and second door members and a lid member which can pivot from a closed position, backward, to an open position. When the door and lid members are in the open position, the door members can be attached to the lid member to form a rigid structure. When in the open position and attached, the base of the door members prevents the pack from tipping backward and an inside surface of the lid member provides a stable work surface. The tool pack includes a removable shelf member and a small shelf pouch which can be attached to the shelf member. The shelf member may be installed in the tool protective compartment in a first position to form an open-ended cell for confinement of objects stored beneath the shelf or installed in a second position in which the space beneath the shelf is readily accessible.