The ornamental design for a tool for wheelchairs, as shown and described.
FIG. 1 is a front elevational view of the tool for wheelchairs showing the new design;
FIG. 2 is a rear elevational view of
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a top elevational view thereof;
FIG. 6 is a bottom elevational view thereof; and,
FIG. 7 is a front elevational view thereof which is in condition to be attached to a wheelchair.
Grayed-out (translucent) portions of the drawings, broken line portions, shading portions, and arrows shown in the exploded view are each for illustrative context such as the environment only, and form no part of the claimed design.