Drill Hulk 5/32-Inch Cobalt Steel M35 Jobber Length Twist Drill Bits — Hard Metal & Stainless Steel, Pack of 12

Premium cobalt drill bits for hard metals

When you work with hard metals, precision matters as much as resilience. The Drill Hulk 5/32-Inch cobalt steel M35 twist drill bits are designed to handle demanding metals with a steady, clean cut. The 135-degree split point helps the bit start accurately, reducing wandering on start-up and enabling you to drill with confidence in stainless steel and other tough alloys. With a straight shank and a flute length of 2 inches, these bits strike a balance between control and chip clearance, while the overall length of 3-1/8 inches gives you the reach you need for mid-range drilling tasks.

Key specifications

• Cutting diameter: 5/32 inch
• Flute length: 2 inches
• Overall length: 3-1/8 inches
• Tip geometry: 135-degree split point
• Shank: Straight

Material and durability

These bits are made from high-speed steel with 5% cobalt, delivering improved red hardness and heat resistance compared with standard HSS. This combination is particularly beneficial when drilling into hard metals like stainless steel, where sustained edge performance matters for repeated use at higher temperatures.

Sharpening and longevity

The cobalt alloy maintains uniform hardness throughout, so the cutting edge can be sharpened repeatedly without compromising performance. This helps you refresh the edge and extend the life of the set without sacrificing efficiency on future jobs.

Practical use cases

In real-world projects, these bits excel for clean holes in hard metal surfaces such as machine housings, brackets, and structural components. The 12-piece set arrives with a case that keeps each bit organized, protecting them during transport and storage so you can quickly pull the right size when needed.

What’s included

• 12 cobalt drill bits at 5/32 inch diameter
• Durable carrying case for safe storage

Tips for best results: clamp the workpiece firmly, use light lubrication for metal drilling, start with a steady drill speed, and maintain even feed pressure to minimize deflection. While results can vary by material and setup, this set offers consistent performance on demanding metalworking tasks.