is essentially perpendicular to the post 90 as shown in fig6 a but further allows the post mounting plate 24 to be tilted to about a 45 u00b0 angle relative to the post 90 as shown in fig6 b referring again to fig4 the aperture 42 is preferably designed and sized to allow the tail 92 to be held securely within the post mounting plate 24 during use for example in the embodiment 10 the aperture 42 has a body void section 44 measuring about 1 u00bd inches by 1 u00bd inches contiguous with the second edge 38 and about 1 inch from either side 40 the aperture 42 further includes a tail void section 46 measuring about u00be inch depth by about u215c inch width the mounting plate 24 is affixed to the latching plate 26 along the second edge 38 the latching plate 26 projects downward in the direction of the bottom plate 18 and is angled relative to the mounting plate 24 to form an angle u03c6 of about 45 u00b0 along a lower edge 48 the latching plate 26 includes a notch 28 that is essentially collinear with the tail void section 46 the notch 28 provides a means for the latching plate 26 to reversibly engage a tooth 94 on the post 90 thereby securing the post driver device 10 to the.