The file #8 is hardness testing I finally got down load and the unloaded.
Like Mohs hardness testing for material hunting just like pencil.? The other was magnic and tape now read to hunt materials for mini lathe?
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The best part of a magnic is for stainless steel series 300 in non magnic easy to machine.?
If magnic then 400 and will work harden not fun in mini lathe?
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Dave?
davesmith1800