Standard Pack = 1 piece(s). Material = Carbide ; Diameter = 1/4 inch ; Length of Cut = 1 inch ; Overall Length = 2-1/2 inch ; Shank Diameter = 1/4 inch ; Coating = Diamond ; End Type = Center Cutting ; Helix Angle = 15 Degree ; Shank Style = h6 ; Diameter Tolerance = +0 inch / -0.002 inch ; Length = 2.6 ; Width = 0.55 ; Height = 0.45 ;