We claim the ornamental design for a hammer, as shown and described.
FIG. 1 is a rear, side perspective view of a hammer comprising the present invention.
FIG. 2 is a side elevational view of the hammer shown in FIG. 1.
FIG. 3 is another side elevational view of the hammer shown in FIGS. 1 and 2.
FIG. 4 is a front elevational view of the hammer shown in FIGS. 1, 2, and 3.
FIG. 5 is a rear elevational view of the hammer shown in FIGS. 1, 2, 3, and 4.
FIG. 6 is a top view of the hammer shown in FIGS. 1, 2, 3, 4, and 5.
FIG. 7 is a bottom view of the hammer shown in FIGS. 1, 2, 3, 4, 5, and 6; and,
FIG. 8 is a side elevational view of the hammer shown in its full length.
The broken lines are for environmental purposes only and form no part of the claimed design.
The handle, which is not included in the claim, is shown in FIGS. 1-5 with a line break in its length solely for ease of illustrating the claimed design.