Considering the abuse I went through trying to mill two 80% indentations with a drill press, it held up very well. The tool was very efficient in both drilling and milling and leaves an excellent finish. If you are considering this product for the same purpose, I would recommend using a milling machine. You get a much better finish (much less vibration) and don't have to worry about the bit slipping out of the chuck every five minutes (the first bottom one had a 3/8" hole punched in the bottom of the FCG ). Socket due to unexpected slipping, but I kept that in mind for the second one (marks the tip of the chisel so I know if it's moving down) and went without incident).
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