FIG. 1 is a perspective view of a first embodiment of the invention;
FIG. 2 is a side elevation view of a first embodiment of the invention, the side opposite being a mirror image;
FIG. 3 is a top plan view of a first embodiment of the invention;
FIG. 4 is a bottom plan view of a first embodiment of the invention;
FIG. 5 is a front perspective view of a second embodiment of the invention;
FIG. 6 is a side elevation view of a second embodiment of the invention, the side opposite being a mirror image;
FIG. 7 is a top plan view of a second embodiment of the invention; and,
FIG. 8 is a bottom plan view of a second embodiment of the invention.