1/2" Dia, 2" LOC, 4" OAL M.A. Ford Square End Mill, manufacturer part number 278L50000B.
Specifications: Cutting Diameter: 1/2 in (0.5000 in); Length of Cut: 2.0000 in; Overall Length: 4.0000 in; Shank Diameter: 1/2 in; Number of Flutes: 5; Helix Angle: 40 degrees; Shank Type: Straight; End Type: Square.
Material: Solid Carbide. Coating/Finish: ALtima Blaze. Series: TuffCut XT. Unit of measure: Inch.