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.Specifications. Size - 13/32 in.. Twist Length - 3-7/8 in.. Overall Length - 5-1/4 in.