Drill Hulk 5/16-Inch Cobalt Drill Bits (6-Pack) M35 Jobber Length for Hard Metals

Overview

Meet a reliable set tailored for tough metals. The Drill Hulk 5/16-inch cobalt drill bits deliver consistent performance when drilling hard materials like stainless steel and other hard metals. With a sturdy case and a five-percent cobalt alloy, these bits are built to handle demanding projects without sacrificing edge stability.

Why cobalt matters

Made from high-speed steel with 5% cobalt, these bits offer improved heat resistance and edge retention. The result is steadier cutting under heat, helping maintain shape and precision through challenging materials.

• 5% cobalt content enhances heat resistance and edge durability for tougher metals
• Uniform hardness throughout the body supports consistent performance
• Designed to resist wear during repeated use on hard metals

Key specs at a glance

• Cutting diameter: 5/16 inch
• Flute length: 3-3/16 inch
• Overall length: 4-1/2 inch
• Point geometry: 135-degree split point for reduced walking
• Shank: 3-flat for a secure grip in the chuck

Applications and longevity

Best suited for drilling in hard metals, including stainless steel, these bits are designed to tackle demanding machining tasks. The cobalt composition supports longer tool life, while the 3-flat shank helps reduce slippage during precision work.

What’s in the box

• 6 pieces of 5/16-inch cobalt drill bits
• Durable carrying case for organization and protection

Usage notes

To maximize performance, consider proper lubrication and steady feed pressure. The set’s sharpenability means you can refresh the cutting edge as needed to extend life in repeated use scenarios.

Whether upgrading a metalworking shop or refining a home project, these bits offer a practical option for users who encounter hard metals and stainless steel. They present a balance of strength, control, and value without promising specific outcomes for every task.