Dier ground anchor has it in medium high winds pulled from the earth (clay) regularly, the back rake have little effect because it is too small, the fixing pegs are also much too short with 12cm to the forces acting on a 45m² weed film at wind trap. 100 fixing pegs to 45m² film in clay and thus pretty solid ground, and the film was at average wind speeds off the bed was kept only by the tomatoes. I had to complain the film with stone slabs, since I have with the film any more problems. The film that I bought and reviewed here is very good, but the hooks are useless.