Shackle Lock

FIG. 1 is a front perspective view of a shackle lock showing my new design;

FIG. 2 is a left side view thereof;

FIG. 3 is a right side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a bottom view thereof; and,

FIG. 7 is a top view thereof.

The broken lines represent portions of the shackle lock that form no part of the claim.