Chicago-Latrobe Screw Machine Drill, General Purpose, Series: 157, Imperial, #1 Drill - Wire, 0.228 in Drill - Decimal Inch, 2-7/16 in Overall Length, 3XD Cutting Depth, 2 Flutes, Right Spiral Flute, 1-5/16 in Flute Length, 0.228 in Dia x 1.125 in L Shank, Straight Shank, 118 deg Point, Radial Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Bright, Applicable Materials: Alloy Steel, Carbon Steel, Cast Iron and Non-Ferrous Materials