3/8" Dia, 2" LOC, 4" OAL M.A. Ford Square End Mill, manufacturer part number 13837508F.
Specifications: Cutting Diameter: 3/8 in (0.3750 in); Length of Cut: 2.0000 in; Overall Length: 4.0000 in; Shank Diameter: 3/8 in; Number of Flutes: 3; Helix Angle: 36 degrees; Shank Type: Straight; End Type: Square.
Material: Solid Carbide. Coating/Finish: Fordlube. Series: TuffCut X-AL. Unit of measure: Inch.