Dormer Subland Step Drill, Long Length, Series: A402, Metric, 11 mm Diameter Minimum Hole, 18 mm Diameter Maximum Hole, 191 mm Overall Length, 4XD Cutting Depth, 23 mm Step Depth, Spiral Flute, 130 mm Flute Length, 18 mm Shank, Straight Shank, 118 deg Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Steam Tempered, Applicable Materials: Aluminum, Magnesium, Cast Iron, Copper, Nickel, Stainless Steel, Steel Alloy, Titanium and Synthetic Material