Carbide chipped on douglas fir

Bought the set as I had 160 holes I needed in some support braces. Using the 1 7/8" bit, I was able to drill them but noticed halfway through that the edge on two of the 4 carbide edges had chipped. Given the soft wood I was using, I'm concerned about the durability of this set. This bit still left a flat hole as the other two edges were still intact. Kept the set but am not impressed.

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