This stainless steel mount bolts to the left or right side of the spare tire bump stop on pre-1997 Jeeps that have the bump stop option.  Stainless steel mounting hardware is included.  Mounting requires you to drill four 1/4"(7mm)holes in the side of the bump stop bracket.  To achieve adequate roof clearance and realize sufficient RF radiation with minimal reflection, especially on vehicles with either a hard or soft top, the minimum antenna length used on bump stop installations should be 4' (1.2m).