The ornamental design for a set of brackets for fixing and supporting electronic boxes, as shown and described.
FIG. 1 shows an elevated top view of a set of brackets for fixing and supporting electronic boxes according to a preferred embodiment of the present invention.
FIG. 2 shows a top plan view of the set of brackets for fixing and supporting electronic boxes of FIG. 1.
FIG. 3 shows a bottom plan view of the set of brackets for fixing and supporting electronic boxes of FIG. 1.
FIG. 4 shows a front side view of the set of brackets for fixing and supporting electronic boxes of FIG. 1.
FIG. 5 shows a back side view of the set of brackets for fixing and supporting electronic boxes of FIG. 1.
FIG. 6 shows a right side view of the set of brackets for fixing and supporting electronic boxes of FIG. 1; and,
FIG. 7 shows a left side view of the set of brackets for fixing and supporting electronic boxes of FIG. 1.
The broken lines showing an electronic box is for illustrative purposes only and forms no part of the claimed design.