Hertel 5/16" Diam, 13/16" LOC, 4 Flute Solid Carbide Ball End Mill Uncoated, Single End, 2-1/2" OAL, 5/16" Shank Diam
New in original package which is a bit dirty.

Specifications

Mill Diameter (Inch) 5/16
Mill Diameter (Decimal Inch) 0.3125
Length of Cut (Inch) 13/16
End Mill Material Solid Carbide
Coating/Finish Uncoated
Number Of Flutes 4
Helix Angle 30
Variable Index No