My first Dado Blade set.  Instructions for set up on the saw are non existent in the package.  However, after searching youtube and the Web, I found a video that explained pretty well how to do it.  My saw is a Delta 36-725, it is not easy to exchange blades and even more of a challenge to install the Dado blades.  (There is a blade guard that is not easily removed that you have to contend with) That is not the fault of the blade, once I was able to get the blades on and set up on the saw I made a beautiful Dado in a test piece of softwood. The results were worthy of the 5 stars I gave it.  Very nice - flat bottom, sharp shoulders and straight edges.  I would recommend this tool.  For the price, it does a superb job!