FIG. 1 is perspective view of a handle for a medical instrument in accordance with the new design;

FIG. 2 is a left-side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a right-side view thereof; and,

FIG. 7 is a rear view thereof.

The broken line showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design.