Convenient, efficient and portable internal hexagonal wrench

The utility model discloses an internal hexagonal wrench which is convenient, efficient and easy to carry, and belongs to the technical field of wrenches. The tool comprises a crosshead, a fixed metal sleeve and a long internal hexagonal wrench, the fixed metal sleeve is of a cuboid structure, rectangular grooves are formed in the vertical center lines of the left side face and the right side face of the fixed metal sleeve, and the upper end and the lower end of each rectangular groove are horizontally provided with metal sleeve shaft holes for the long internal hexagonal wrench, short grooves with the same horizontal width as the upper and lower surfaces are formed in the vertical center lines of the upper and lower surfaces of the fixed metal sleeve, and cross head metal sleeve shaft holes penetrating through the short grooves are formed in the horizontal center lines of the short grooves; and the crosshead is fixed in the short groove through the crosshead metal sleeve shaft hole. The internal hexagonal wr