9/16" Dia, 1-1/8" LOC, 3-1/2" OAL M.A. Ford Square End Mill, manufacturer part number 11156250C.
Specifications: Cutting Diameter: 9/16 in (0.5625 in); Length of Cut: 1-1/8 in; Overall Length: 3-1/2 in; Shank Diameter: 9/16 in; Number of Flutes: 4; Helix Angle: 30 degrees; Shank Type: Straight; End Type: Square.
Material: Solid Carbide. Coating/Finish: TiCN. Series: TuffCut GP. Unit of measure: Inch.