FIG. 1 is a bottom, right, frontal perspective view of an embodiment of our invention;
FIG. 2 is a frontal and also a rear elevational view thereof;
FIG. 3 is a right side and also a left side elevational view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a bottom plan view thereof; and,
FIG. 6 is a front elevational and also rear elevational view of a second embodiment of our invention, which is identical to the first but for the possibility of varied length as indicated.
The broken line representations of threads in FIGS. 1-3, 5 and 6, and of an opening in FIGS. 1 and 5, are for purposes of illustration only and form no part of the claim subject matter.