This blade rake is primarily for thinning the upper coat of rough-haired breeds. The soft undercoat remains completely intact. Instructions for use: Take a tuft of hair and keep it firmly enclosed between thumb and knife blade. Now turn it in your direction and pull the knife away from the coat with gentle, steady movements. Clean the knife blade regularly with water and an antiseptic solution such as Dettol or Barbicide to prevent bacterial growth. Then let it dry well! Suitable for hairy dog breeds.