Works great for my golden retreiver to remove the undercoat and detangle

I have a golden that loves to swim.  His hair gets matted and I needed a good way to untangle all the hair.  This is exactly what I needed!  It works great to untangle his hair and get all the loose underhair out so it doesn't get all over my house.  My dog is constantly shedding and this undercoat removal brush is a perfect supplement to normal brushing of his hair.  It get's the tangles out.  There are two sides... One side has more space in-between the rake than the other. You start with the wider side to get through the knots then you switch over to the other to really get all the hair out.  It doesn't hurt the dog.  It's a win win.  Getting all the undercoat out keeps the dog cooler and brushing the hair out keeps it out of the house too.  I give this a 5 star rating.  It's exactly what I needed!