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3D3DCobalt steel bit.
A cobalt-steel roughing end mill. The serrated flutes remove material rapidly, but leave a rough surface.
Source: eBay seller singlepoint
Contributor: Theodore Gray
Acquired: 11 March, 2009
Text Updated: 12 March, 2009
Price: $13
Size: 4"
Composition: FeMoCo
Molybdenum