The ornamental design for a grippingtool, as shown and described.
FIG. 1 is a bottom, front and right side perspective view of a gripping tool, showing the new design;
FIG. 2 is enlarged bottom, front and right side perspective view of FIG. 1;
FIG. 3 is a top, front and right side perspective view thereof;
FIG. 4 is a front elevation view thereof;
FIG. 5 is a rear elevation view thereof;
FIG. 6 is a left side elevation view thereof;
FIG. 7 is a right side elevation view thereof;
FIG. 8 is a top plan view thereof; and,
FIG. 9 is a bottom plan view thereof.
The dashed lines formed by short segments of equal length and equal spacing shown in the figures illustrate portions of the gripping tool that form no part of the claimed design.