Chicago-Latrobe Taper Length Drill, General Purpose, Series: 120, O Drill - Letter, 0.316 in Drill - Decimal, 6-1/2 in Overall Length, 4-1/8 in Depth of Cut, Spiral Flute, 4-1/8 in Flute Length, 0.316 in Shank, Straight Shank, Point 118 Degrees, Conventional Point, Right Hand Direct Cut, HSS Cutting Edge, HSS, Black Oxide, Applicable Materials: Carbon Steel, Alloy Steel and Cast Iron