The patent focuses on the holder for a wrench set comprised of a ratchet, hex-shaft nut driver / handle, and hex drive sockets and screwdriver tip.
The top portion is a slip-in holder for the hex bar and ratchet. It hinges to one side to open the compartment for the sockets.
A known example is marked only with the patent number stamped in the base; the set may have had a paper label or come in a box.