Specification: Cutting Diameter: 1/16,1/8,5/32,3/16,1/4,5/16,3/8,1/2,5/8 Length:2-3/8,2-1/2,2-5/8,2-3/4,3-3/4 Flute: 4 flutes Range of Processing: Cast iron, Aluminum, Soft alloy steel, Low-carbon Steel, Copper, Di steel