Review on Timberline 670 160 🔧 Forstner Shank Set of 16 Pieces by Justin Guldin

I bought these as a gift so the comments in my review are limited and not based on usage. I put a dial indicator on the stem to measure run out. The concentricity, measured on my drill with center gauge, is 0.003. The run out of Timberliine bits (I accidentally tested three) ranges from .003 to .005 inches measured on the shank closest to the bit. In other words, runout is only 0.002" better than my drill spindle. I accidentally measured the diameter with a caliper and they match the specs. They are machine sharpened but not resharpened. You can use touches with a diamond file or a stone. That's not unusual, especially in this price range, but it's the reason I don't give it 5 stars. I have previously purchased and quickly returned the Roman Carbide brand due to excessive wear. I am much happier with them and I think the recipient will be too.