3016020 Cobalt Jobber Drill Bit, 5/16 In. Dia, 4-1/2 In. OAL

This Irwin cobalt jobber drill bit is engineered for drilling tough metals, including heavy-duty abrasive alloy metals and hardened steel. The 5/16-inch diameter bit with 4-1/2-inch overall length delivers reliable performance in demanding metalworking applications where standard steel bits wear quickly or break under pressure.

Cobalt construction with M-35 high-speed steel and 5% cobalt content provides superior heat and abrasion resistance, allowing the bit to maintain its cutting edge longer when drilling through heat-treated steel and other challenging materials. The heavy-duty web construction reinforces the bit's structural integrity, reducing the risk of breakage during tough drilling tasks.

Features and Benefits

• Split Point Design: The 135-degree split point begins drilling immediately and minimizes bit walk, enabling more precise hole placement.
• Cobalt Construction: M-35 high-speed steel with 5% cobalt provides superior heat resistance and extended tool life compared to standard steel bits.
• Heavy-Duty Web: Reinforced web construction increases durability and resistance to breakage during demanding drilling operations on hardened materials.
• High-Speed Steel with Cobalt: Engineered for tough metal drilling, including heavy-duty abrasive alloy metal and heat-treated hardened steel applications.

Specifications

• Brand: Irwin
• Model: 3016020
• Bit Diameter: 5/16 inch
• Shank Diameter: 5/16 inch
• Overall Length: 4-1/2 inches
• Material: High-speed steel with M-35, 5% cobalt
• Flute Type: Spiral, 1-flute
• Point Style: 135-degree split point