We are building a fence around our garden and needed a way to set 6x6 posts for the gate. These worked great. We had one mishap because of a knot in a post. When the center of the bracket got to the knot it stopped it and eventually (after lots of sledge hammer action) the bracket broke. Make sure you don't have any knots in the post within 6 inches of the bottom.... turns out that bit of wisdom is also in the directions.