We claim the ornamental design for an interface of a power tool, as shown and described.
FIG. 1 is a front perspective view of an interface of a power tool according to the present invention in a first configuration.
FIG. 2 is another front perspective view of the interface of the power tool shown in FIG. 1.
FIG. 3 is a rear perspective view of the interface of the power tool shown in FIG. 1.
FIG. 4 is another rear perspective view of the interface of the power tool shown in FIG. 1.
FIG. 5 is a front view of the interface of power tool shown in FIG. 1; and,
FIG. 6 is a bottom view of the interface of power tool shown in FIG. 1.
Any broken lines represent unclaimed subject matter and form no part of the claimed design. Any dash-dot broken lines represent boundary lines. The dash-dot broken lines themselves form no part of the claimed design.