Review on SpeTool Tapered 4 36Deg Machine Engraving by Brian Krump

I've used this end mill a few times, it probably lasted about 20 hours. It still cuts like new. Compared to end mills that I paid a lot more for, I can't tell the difference in performance with this one. I actually went back and bought 4 more different sizes. So the actual diameter is 0.060 inch, call it 1/16 inch diameter in round numbers. Some NC programs require a radius, some a diameter in the tool designation.