IBX1658 Features: * Aircraft extension high speed steel fractional straight shank drill bits * 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 degree split point ensures true start and eliminates bit walking * Size: 1/2"" Construction: * Bit is constructed of M-2 high speed steel for best combination of strength, heat resistance, and wear resistance Dimensions: * Twist length: 4-1/2"" * Overall length: 12""