The Irwin M-35 cobalt reduced shank drill bit features a 3/8" shank that fits standard 3/8" drill chucks while delivering a 7/16" hole. Built with 5% cobalt alloy for superior heat and abrasion resistance in tough metals.

• M-35 cobalt alloy steel (5% cobalt) for maximum hardness
• 135-degree split point starts on contact and reduces walking
• 3/8" reduced shank fits standard 3/8" drill chucks
• Heavy duty web construction for added strength
• Gold oxide finish for corrosion resistance
• Drills hardened steel, stainless steel, titanium, and super alloys
• 7/16" diameter x 5-1/2" overall length, 2-5/8" flute length