IBX1918 Features: * Straight shank drill bit * Aircraft extension * Fractional * Ideal for drilling in hard to reach areas and for running wires and cable * For general use in wood, metal and plastic * Black oxide coating resists corrosion * 135 split point ensures a true start and eliminates bit walking * 1-5/8"" twist length * 1/8"" x 12"" Construction: * Constructed of M 2 high speed steel for the best combination of strength, heat resistance and wear resistance