OK...... let me be the first to comment on this tool. Bryan has made me several over the years, they WORK like a MULE and much like the Energizer Bunny they never run out of the ability to turn the shavings off like slicing through butter with a hot knife!
I have used mine for a year and more, and I have turned hundreds of calls with only changing out the insert once, and wouldn't have done that only I wanted to turn some Acrylic and thought that the bit needed to be sharper, and most likely it would have done the job just as well as the new one.
This particular tool would make a great pot call tool, bowl or platter tool or anything that would require a smooth finish. You cannot go wrong with this one, the bits themselves would cost you as much as he is wanting for the whole tool! pappy