I used these bits to connect 12 segments of white oak into a circle. The bits seemed to dull quickly as the first few cuts were just fine with just the stop. After breaking a few pieces when the bit caught instead of cutting, I made a reliable jig and the rest of the cuts were successfully completed. White oak is a pretty tough material and I probably should have used a jig from the start as these are larger pieces that remove a significant amount of material.
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