FIG. 1 is a perspective view of the preferred embodiment, and;

FIG. 2 is an end elevational view of FIG. 1, having an opposite end being a mirror image thereof, and;

FIG. 3 is a side elevational view of FIG. 1, having another side being a mirror image thereof, and;

FIG. 4 is a top plan view of FIG. 1, and;

FIG. 5 is a bottom plan view of FIG. 1; and,

FIG. 6 is a cross sectional view taken along lines 6--6 of FIG. 4.