FIG. 1 is a perspective view of a lock showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a bottom view thereof;
FIG. 6 is a top view thereof;
FIG. 7 is a rear elevational view thereof;
FIG. 8 is a perspective view of a second embodiment of the lock;
FIG. 9 is a front elevational view thereof;
FIG. 10 is a left side elevational view thereof;
FIG. 11 is a right side elevational view thereof;
FIG. 12 is a top view thereof;
FIG. 13 is a bottom view thereof;
FIG. 14 is a rear elevational view thereof;
FIG. 15 is a perspective view of a third embodiment of the lock;
FIG. 16 is a front elevational view thereof;
FIG. 17 is a left side elevational view thereof;
FIG. 18 is a right rear elevational view thereof;
FIG. 19 is a top view thereof;
FIG. 20 is a bottom view thereof; and,
FIG. 21 is a rear elevational view thereof.
The broken lines indicate environment and forms no part of the claimed design.