Latrobe Chicago Screw Machine Drill, General Purpose, Series: 157, Imperial, O - Letter Drill, 0.316 in. Drill Bit, Decimal Inch, 2-15/16 in. Overall Length, 3XD Depth of Cut, 2 Flutes, Right Hand Spiral Flute, 1-11/16 in. Flute Length, 0.316 in. Dia. x 1.25 in. Long. Ank, Straight Shanan K, 118 Degree Point, Radial Tip, Right Hand Cutting Direction, HSS Cutting Edge, Bright, Applicable Materials: Alloy Steel, Carbon Steel, Cast Iron and Non-Ferrous Materials