I've read reviews of other bit sets and found that many were disappointed when the bit broke. I believe most users have cut too deep or too fast or both. This bit, like any other 1/8" bit, is not designed for deep plunge cuts for structural (Dutch) inserts. As thin as the insert. The insert is usually a very thin veneer, perhaps only a few millimeters. For that, this kit works flawlessly. Whiteside kits are well designed and very well made. It's American quality and it speaks for itself.
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