FIG. 1 is a perspective view of a shackle according to my new design;
FIG. 2 is another perspective view of the shackle of FIG. 1;
FIG. 3 is a front elevational view of the shackle of FIG. 1;
FIG. 4 is a top plan view of the shackle of FIG. 1;
FIG. 5 is a left side elevational view of the shackle of FIG. 1;
FIG. 6 is a right side elevational view of the shackle of FIG. 1;
FIG. 7 is a rear elevational view of the shackle of FIG. 1;
FIG. 8 is bottom plan view of the shackle of FIG. 1;
FIG. 9 is a perspective view of a second embodiment of the shackle according to my new design;
FIG. 10 is another perspective view of the shackle of FIG. 9;
FIG. 11 is a front elevational view of the shackle of FIG. 9;
FIG. 12 is a top plan view of the shackle of FIG. 9;
FIG. 13 is a left side elevational view of the shackle of FIG. 9;
FIG. 14 is a right side elevational view of the shackle of FIG. 9;
FIG. 15 is a rear elevational view of the shackle of FIG. 9; and,
FIG. 16 is bottom plan view of the shackle of FIG. 9.
The dashed lines in FIGS. 1-16 represent environment and are for illustrative purposes only and do not constitute part of the claimed design. The phantom lines in FIGS. 1-16 define the border between claimed and unclaimed matter.