Dormer Aircraft Extension Drill, Type B, Series: A243, #20 Drill - Wire, 0.161 in Drill - Decimal Inch, 6 in Overall Length, 4XD Cutting Depth, 2 Flutes, Spiral Flute, 2-1/8 in Flute Length, Straight Shank, 135 deg Point, Split Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Bright, Applicable Materials: Steel, Stainless Steel, Cast Iron, Titanium, Nickel, Copper, Aluminum, Magnesium and Hard Materials