I'm in Houston, we have clay soil that can be very difficult to work with. The anchors worked well once we got them drive, but ended up bending the rod, and using 3/4" rebar instead. My SDS plus demo hammer wasn't enough to effectively drive through the clay past a foot or two and resorted to a 2# sledge. These were perfect for securing furniture in paved patio. I suspect the challenges were unique to our local soil conditions.