- Constructed of M-42 8 percent Cobalt Alloy Steel for super abrasive resistance in tough metals
- Cobalt Alloy Steel extends cutting edge life and maintains cutting life after resharpening
- Extra hard drill for greater wear
- 135° Split point tip starts on contact, cuts with less force
- Rubber overmolded case protects kit if dropped
- Tap and Drill selection chart for convenient reference
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 alloy is heat and abrasion-resistant. 135-degree split-point tip starts drilling immediately with less force and eliminates "walking" across the work surface. Metal index case for easy bit access and identification. Includes drill bit sizes 1/16- to 1/2-inch in 1/64-inch increments. IRWIN Tools Cobalt Alloy Steel High-Speed Steel Drill Bit, 29-Piece Metal Index Set (3018002).
