US D550447 S1
The ornamental design for a keychain flashlight, as shown.
FIG. 1 is a right-hand side view of a keychain flashlight according to the invention;
FIG. 2 is a left-hand side view;
FIG. 3 is a front view;
FIG. 4 is a back view;
FIG. 5 is a top view; and,
FIG. 6 is a bottom view.