Used where more precisely sized holes are required, Drills exact hole size; ideal for tapping, Bit is constructed of M-2 high speed steel for the best combination of strength, heat resistance, and wear resistance, Standard 118 degree point for use in wood, metal, and plastic, Size: No, 4, Twist Length : 2-1/2"", Overall Length: 3-3/4"", SKU: ISN13380