First, you need a very rigid setup to run this thing. I broke mine on a drill press because I have a slight wobble. After snapping off the tip I roughly sanded it and was able to cut through a 3/16 file I've been trying to work on for days. The high speed and pressure worked great, I drilled 4 holes, looks like it has many more holes. In general, the material from which it is made is of very high quality.
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