The ground anchors I needed for the bottom flow (PE film from Aldi) for the new bark mulch paths and seating area. The film is relatively stable. For 5mx2m base film I needed 10 ground anchors. They anchored in Grassterrain the last storm, the film without seeking Rjndenmulch. I found great. Also have a hammer used (rubber mallet, you also used for tent pegs). For me, none of the ground anchor has bent! And the rust after Zvi days, I can not confirm. I do not care anyway, disappear under the mulch. So all in all, good value for money. Would I buy it again.