if you are like me and not ready to spend [money]on a dado set, look no further.  this baby performs.  i chose the 6" for my 10" delta contractors saw. i believe this is wise to compensate for the lower horsepower of my saw.  a smaller blade will have more rpm's than an 8" or 10". its physics.  anyway, i like the case to keep it all organized and it comes with a handy guide that tells you what chippers and shims to use for certain cuts.  quite handy for undersized plywood.  big carbide tips that look like they will stand up to several sharpenings.