Standard Pack = 1 piece(s). Coating = Aluminum Titanium Nitride; Diameter = 1 IN , 1 IN ; Center Cutting; Finish = Bright; Flute Length = 1-1/2; Flute Type = 30 Degree Helix; Material = Carbide; Number of Flutes = 3 IN ; Overall Length = 4 IN ; Shank Diameter = 4 IN ;