Dormer Taper Length Drill, Long Length, Series: A110, 21 mm Drill Size - Metric, 0.8268 in Drill Size - Decimal Inch, 261 mm Overall Length, 6XD Cutting Depth, Spiral Flute, 171 mm Flute Length, 21 mm Shank, Straight Shank, 118 deg Point, Split Point, Right Hand Cutting, HSS Cutting Edge, HSS, Steam Oxide, Applicable Materials: Magnetic Soft Steel, Structural Steel, Case Carburizing Steel, Plain Carbon Steel, Alloy Steel, Hardened and Tempered Steel