I inherited my mom's dog, Chester. He is a Chow/Lhasa mix and his hair is fine but it gets matted easily. This GoPets tool is designed to help comb out the matted fur. I noticed that you have to start using the tool at the end of the matted fur and work your way up into the mat. This way it causes less stress for the dog and less pain, too. One side has the blades closer together than the other. The blades themselves, have a rounded tip to avoid injuring the skin. His hair doesn't look much different because it's so fine. But when he gets matted hair from chewing this tool works great to help separate the mats without having to cut the hair off.
I received this product at a discount in exchange for my honest and unbiased review.