The ornamental design for a handle for a surgicalinstrument, as shown and described.
FIG. 1 is a right perspective view of a handle for a surgical instrument, the left perspective view being a minor image of the right perspective view;
FIG. 2 is a right side view of the handle for a surgical instrument of FIG. 1; the left side view being a mirror image of the right side view;
FIG. 3 is a front end view of the handle for a surgical instrument of FIG. 1;
FIG. 4 is a back end view of the handle for a surgical instrument of FIG. 1;
FIG. 5 is a top view of the handle for a surgical instrument of FIGS. 1; and,
FIG. 6 is a bottom view of the handle for a surgical instrument of FIG. 1.
The portions of the article in broken lines are directed to environment and are for illustrative purposes only; the broken lines form no part of the claimed design.