Precision Twist Drill Taper Shank Drill Bit, General Purpose Type N, Series: 5ATS, Metric/Imperial, 23 mm Drill - Metric, 0.9055 in Drill - Decimal Inch, 253 mm Overall Length, 4XD Cutting Depth, 2 Flutes, Spiral Flute, 155 mm Flute Length, #2 Morse Taper Shank Taper Designation, 118 deg Point, Conventional Point, Right Hand Cutting Direction, HSS Cutting Edge, No Through Coolant, HSS, Steam Oxide, Applicable Materials: Steel, Stainless Steel, Cast Iron, Titanium, Nickel, Copper, Aluminum Magnesium, Synthetic Materials, Hard Materials and Graphite