As a hesitant buyer I was hoping to save money by purchasing this router bit, but it was a total waste. As a result of using this product, I found that it was POORLY made and left rough edges. The only pro was that it fit in my router. However, it didn`t last long before it became dull and unusable. I would not recommend this product to anyone in the Industrial and Scientific field .Spend the extra money on a better quality bit..