Wahl’s Competition Series blade sets provide an amazingly smooth, show quality cut. These blades have every characteristic a professional looks for in a USA quality manufactured blade, such as having a hexavalent chrome finish for superior rust and corrosion protection that prolongs blade life. A Skip Tooth Blade helps feed the hair into the cutting blade more effectively, plus it is good for a rough cut prior to washing the dog. It can certainly be used for the finished cut – it just leaves the dog’s coat with more layered look but it still looks neat and tidy. It will probably be necessary to use a short skip tooth blade on a dog who is matted or with a very thick coat close to the skin. A Coarse Blade is generally a blade that offers a slightly wider space between the teeth on the blade that groomers can use on coarse, thick and matted coats to help feed the coat better through the blade teeth. The #4 Skip Extra Coarse Competition Series Blade features a 8mm cutting length. This blade set fits all Wahl, Oster & Andis Detachable Style Clippers.