Not fit for purpose. This is impossible to hammer in unless your soil is like butter down to 40cm. I tried after 3 days of torrential rain to make sure the soil was as soft as possible and it still wasn't possible to get close to driving it in. Also, the blade (which is hardly designed for cutting anyway) will bend resulting in it offering a completely rounded end to the soil - which completely prevents it cutting. Also, ignore the user instructions showing a small plank of wood as a buffer to prevent damage to the spike. You will need several metres of really hard thick wood to make any impression at all.