Hanson Cobalt Drill Bit 5/16 in. is engineered for professionals who demand precision and durability when working with the toughest metals. Crafted from premium cobalt steel and featuring a 135° split point, this jobber-length bit starts on contact and resists “walking,” so you get clean, accurate holes every time. The heavy-duty web construction ensures strength under high stress, making it ideal for stainless steel, cast iron, hardened alloys and other demanding drilling applications.

Key Features

• 135° split-point tip for fast, accurate starts and reduced walking
• 5/16 in. (0.3125 in.) cutting diameter for standard hole sizes
• Jobber-length 4½ in. design balances reach and rigidity
• Heavy-duty web construction for extra strength in high-torque work
• Straight shank for secure chuck gripping and minimal run-out
• High-temperature cobalt steel retains hardness under heat

⚠️ WARNING: This product contains chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.