9 serrated blades remove loose hair while thinning out the undercoat. Quick to clear away knots and tangles, this comb is a great first approach when dealing with difficult mats. Easy and safe to use, it is beneficial to the health of pets. A metal thumb rest, located between the blades and plastic handle, ensure superior control and efficiency while protecting both hands and coats. This product is suitable for dogs and cats with thick and tangled coats.