The ornamental design for a handle for a magnifier, as shown and described.
FIG. 1 is a perspective view of a handle for a magnifier showing our new design;
FIG. 2 is a first end elevational view of FIG. 1;
FIG. 3 is a second end elevational view of FIG. 1;
FIG. 4 is a right side elevational view of FIG. 1;
FIG. 5 is a left side elevational view of FIG. 1;
FIG. 6 is a top plan view of FIG. 1;
FIG. 7 is a bottom plan view of FIG. 1;
FIG. 8 is a perspective view of the handle for a magnifier in an extended position; and,
FIG. 9 is a side elevational view of the handle for a magnifier illustrating an alternative extended position.
The dotted lines are intended to show features that are environmental only and form no part of the claimed design. Also, there is no intent to claim any surface indicia as all such surface lines are merely intended to be shading lines.