US Patent 9156157 Tool box with storage members

A tool box includes two pivoted halves and a chamber with a bottom and two opposite walls. A plurality of positioning units formed in the walls each include a positioning cavity located in one direction, a first guide groove located farther from the bottom than the positioning cavity, a first pivot cavity at one end of the first guide groove and located in the one direction, a second pivot cavity formed at another end of the first guide groove and located in another direction, a second guide groove and located between the first pivot and positioning cavities, a third pivot cavity formed at one end of the second guide groove, located in the two directions and disposed between the first pivot and positioning cavities, and a fourth pivot cavity formed at another end of the second guide groove and located between the second pivot cavity and the bottom.