Chicago-Latrobe - Workman's Length Drill, Series: 150B, Imperial, I Drill - Letter, 0.272 in - Decimal Inches, 4-1/8 in Overall Length, 2-7/8 in Depth of Cut, 2 Flute, Right Hand Spiral Flute, 2-7/8 in Flute Length 0.272 in Diameter x 1.2 in L Shank, Straight Shank, 11 Radial Point, Right Hand Cutting Direction, HSS Cutting Edge, No Step Coolant, HSS, Bright, Applicable Materials: Aluminum, Copper, Carbon Steel, Mild Steel, Magnesium, Non-Ferrous Metals, Non-Metal, Slate, Thermoplastic and Wood