Has loose chamfer angles and a shank rectangle part, and precisely finishes the hole after passing the drill hole and the rough reamer.Work material: Cast iron, carbon steel, alloy steel, tool steel, stainless steel, aluminum alloy.Number of Blades:8Cutting Diameter (mm):15.30Blade Length (mm):95Total Length (mm):185Shank Diameter (mm):15.30Corner opposite side (mm):11High Speed Steel (HSS)