I claim the ornamental design for an air tool, as shown and described.
FIG. 1 is a perspective view of an air tool, such as a paint sprayer.
FIG. 2 is a top view of the tool shown in FIG. 1.
FIG. 3 is a bottom view of the tool shown in FIG. 1.
FIG. 4 is a front view of the tool shown in FIG. 1.
FIG. 5 is a rear view of the tool shown in FIG. 1.
FIG. 6 is a right side view of the tool shown in FIG. 1; and,
FIG. 7 is a left side view of the tool shown in FIG. 1.
The present application is directed to the shape and contour of the design illustrated in the drawings. The broken line showing of the environment is for illustrative purposes only and forms no part of the claimed design. The broken lines which define the boundaries of the claimed design form no part thereof.