I bought it before I got the Dadonator set. I could have saved the cost. Now I have 3 rim blades. It's all good though. 

Somewhere I have one of those Freud 1/4" and 3/8" blades where you marry both halves to make a nested blade, but it doesn't make as clean of a cut, and it has tiny winglettes in the bottom of the cut. This thing makes chiseled out sides, and a dead flat bottom.