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:4Cutting Diameter (mm):2.20Blade Length (mm):30Total Length (mm):60Shank Diameter (mm):3.00Corner opposite side (mm):2.5High Speed Steel (HSS)