Standard Pack = 1 piece(s). Coating = Titanium Nitride; Diameter = 7/16, 0.4375 IN ; Ball Center Cutting; Finish = TiN; Flute Length = 1 IN ; Flute Type = 30 Degree Helix; Material = High Speed Steel; Number of Flutes = 2 IN ; Overall Length = 3-1/4; Shank Diameter = 3-1/4;