The ornamental design for a handle for a fixedblade knife, as shown and described.
FIG. 1 is a top front and right side perspective view of a knife handle showing my new design;
FIG. 2 is a bottom front and side perspective view thereof;
FIG. 3 is a right side elevational view thereof;
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a bottom plan view thereof;
FIG. 6 is a top plan view thereof;
FIG. 7 is a front elevational view thereof; and,
FIG. 8 is a rear elevational view thereof.
The broken lines of the knife blade is for environmental purposes only and form no part of the claimed design. The design shown is not to be limited to any particular size and may be scaled larger or smaller.