The Freud Economy Dado Set has negative hook angles make flat bottom grooves and virtually splinter-free cuts. It has two outside blades with three 2-wing chippers. This makes it ideal for underpowered saws because it requires less power to feed. All blades and chippers come with Freud's anti-kickback design. This resharpenable set will produce grooves from 1/4" to 7/8" in 1/16" increments. This dado set comes with a shim set and carrying case as well as instructions on how to make basic dado sizes.