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 is heat and abrasion-resistant;135-degree split-point tip starts drilling immediately with less force and eliminates walking across the work surface;Bit has a straight shank

• Irwin Tools 3016128 Single Cobalt High-Speed Steel Drill Bit, 7/16 x 5-1/2
• 7/16"

Irwin Tools 3016128 Single Cobalt High-Speed Steel Drill Bit, 7/16 x 5-1/2IRWIN