Chicago-Latrobe Taper Length Drill, General Purpose, Series: 120, #1 Drill, Wire, 0.228 in. Drill, Decimal Inches, 6-1/8 in. Overall Length, 3-3/4 in. Depth of Cut, 2 Flute, Spiral Flute, 3-3/4 in. Flute Length, 0.228 in. Shank, Straight Shank, 18 Degree Point, Radial Point Point, Right Hand Cutting Direction, HSS Cutting Edge, HSS, Black Oxide, Applicable Materials: Alloy Steel, Carbon Steel, and Cast Iron