Standard Pack = 1 piece(s). Cutting Diameter = 1/4 inch ; Overall Length = 4 inch ; Flute Length = 2-3/4 inch ; Shank Diameter = 1/4 inch ; Number of Flutes = 2 ; Material = Carbide Tipped ; Drill Point Angle, type = 135, 4 Facet Split ; Coating type = Uncoated ; Coolant Fed = No ; Drill Application information = Drilling Holes in cast and ductile iron, copper, bronze, brass, cast Aluminum, Fiberglass, Hard plastics, graphite, carbon and other abrasive materials. Not for Steels. ;