Straight shank drill bit Aircraft extension Fractional Ideal for drilling in hard to reach areas and for running wires and cable Constructed of M 2 high speed steel for the best combination of strength, heat resistance and wear resistance For general use in wood, metal and plastic Black oxide coating resists corrosion 135 split point ensures a true start and eliminates bit walking 3-3/16-in twist length 5/16-in x 12-in