Freud's Safety Dado series provides the highest quality results while maintaining a level of safety never found in a dado before. This stacked dado with its razor-sharp outside blades will produce grooves or rabbets which are flat bottomed and virtually splinter-free in solid woods. Stacked dadoes are more precise than other styles of dadoes and with the use of Freud's Shim Set (sold separately) the kerf width can be adjusted by as little as .004 for the correct fit. However, it is the safety features of this blade that make it the best in the industry. Through the use of kickback reducing limitators on both the outside blades and chippers.