1/2" Dia, 1-1/4" LOC, 3" OAL M.A. Ford Square End Mill, manufacturer part number 17750020AW.
Specifications: Cutting Diameter: 1/2 in (0.5000 in); Length of Cut: 1-1/4 in; Overall Length: 3.0000 in; Shank Diameter: 1/2 in; Number of Flutes: 4; Helix Angle: 35 degrees-38 degrees; Shank Type: Weldon Flat; End Type: Square.
Material: Solid Carbide. Coating/Finish: ALtima. Series: TuffCut XR. Unit of measure: Inch.