Irwin 3016032 Cobalt Alloy Steel High Speed Steel Fractional Straight Shank Drill Bit 1/2-in.

Ideal for drilling in tough metal, including heavy-duty abrasive alloy metal drilling on hardened steel | Made from industrial grade High-Speed Steel for increased durability. 8% Cobalt Alloy Steel is heat and abrasion-resistant | 135-degree split-point tip starts drilling immediately with less force and eliminates "walking" across the work surface