1/4" Dia, 1-3/4" LOC, 4" OAL M.A. Ford Square End Mill, manufacturer part number 13825009.
Specifications: Cutting Diameter: 1/4 in (0.2500 in); Length of Cut: 1-3/4 in; Overall Length: 4.0000 in; Shank Diameter: 1/4 in; Number of Flutes: 3; Helix Angle: 36 degrees; Shank Type: Straight; End Type: Square.
Material: Solid Carbide. Coating/Finish: Uncoated. Series: TuffCut X-AL. Unit of measure: Inch.