
These stakes worked fine for me, even in my dense clay soil. I did wet the soil first and poke a "starter" hole with a screwdriver (essential). No problems with breakage when I hammered them in. The only reason I don't give them 5 stars is that I used the edging to create circles for mulch around trees, and the clips at the top of the stakes don't open enough to fit 2 widths of the edging inside to overlap and close the circle. Luckily I had some old stakes with a wider space there, and I used one of them per tree instead of a Master Mark stake.Get more detail about Master Mark 99310 Plastics Terrace Board Brown Landscape Edging Stake Kit.