There are two ways to mount this, a low bracket - that the shorter post slides into or directly bolting the post into the ground. After drilling into concrete and setting the molly's in the holes... I tried to use the bracket method BUT the first of the flush mount screws stripped out immediately. (They are made of fairly soft metal.) *This could have been a really complex fix if it hand not been on the first screw and had it been set all the way in before it stripped or if it stripped on the way out.*  So I switched to option B using the bolts to bolt the 2 foot post directly to the ground. This worked smoothly. (Beware the cheep screws.) Otherwise, functions nicely and does the trick for privacy.