Sandvik Coromant Step and Chamfer Drill, High Performance, Series: CoroDrill® 860, Metric, 3.4 mm Diameter Minimum Hole, 4.6 mm Diameter Maximum Hole, 66 mm Overall Length, 10.2 mm Cutting Depth, 10.2 mm Step Depth, 19 mm Flute Length, 6 mm Shank, Cylindrical Shank, 140 deg Point, Solid Carbide Cutting Edge, Solid Carbide, PVD-TiAlSiN+TiSiN Coated, Applicable Materials: Steel, Cast Iron, Aluminum, Heat-Resistant Alloy and Hardened Materials