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Posted: 4/22/2016 11:05:11 PM EDT

I know it's some kind of end mill but what is its purpose and name?

The flutes are vertical and have about 30* of cutting angle.
Link Posted: 4/22/2016 11:09:43 PM EDT
Link Posted: 4/22/2016 11:10:07 PM EDT
Looks like a reamer to me.
Link Posted: 4/22/2016 11:10:38 PM EDT

It makes holes rounder and diametrically to a higher level of precision than a drill bit.  Typical practice is to drill the hole .015" under the size you intend to ream it, then follow up with the reamer.
Link Posted: 4/22/2016 11:11:32 PM EDT
Uncut pigmy throwing stars
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