What are the different depth settings? Setting Depth Application High 10 mm For pushing behind with the machine; and removing thin thatch layers. Do not use for scarifying Minimal 5 mm For raking healthy lawn. Do not use for scarifying. Middle 0 mm For transport, storage, scarifying and raking. Deep -5 mm For scarifying, not recommended for raking. Deep -10 mm For scarifying, do not use for raking. Related articles My unit will not start. How do I assemble my AJ801E? My Cordless Dethatcher is not operating properly, what do I do? New Charger will only have two Prongs (24VCHRG-QC) Electric Dethatcher