IRWIN 62116-1/4 by 12-Inch Drill Bit 135x This product is easy to use. This product is highly durable This product is manufactured in China. Ideal for drilling in hard-to-reach areas and for running wires and cable Bit is 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 degree split point ensures a true start and eliminates bit walking