Drill America 29 Piece M35 Cobalt Drill Bit Set - Durable Jobber Set

In this review the Drill America 29 Piece M35 Cobalt Drill Bit Set is evaluated for metalworkers and hobbyists who need a complete inch-size range without frequent bit changes. The bottom line: this set is best for anyone drilling steels and other hard metals where heat and wear are a concern because the M35 cobalt material and 135-degree split points keep holes clean and bits lasting longer than standard high-speed steel. The included biodegradable cutting fluid also helps control heat and improve finish during drilling and tapping.

Key Features

• Complete size range: The set includes 29 bits from 1/16in to 1/2in in 1/64in increments, reducing the need to hunt for intermediate sizes.
• M35 cobalt construction: Cobalt steel maintains hardness at high temperatures so bits perform better and last longer when cutting hard metals.
• 135-degree split point: A self-centering tip reduces walking, removes chips more efficiently, and often eliminates the need for a pilot hole.
• Gold oxide finish: The coating adds a level of lubrication and wear resistance that helps extend cutting life and improve finish.
• Tap Magic cutting fluid included: The 4 oz biodegradable fluid dissipates heat quickly and aids in achieving a finer surface when drilling and tapping metals.
• Indexed round case: Labeled compartments keep all 29 jobber-length bits organized and easy to transport.

Who It's For

This set is aimed at machinists, metal fabricators, and serious DIYers who regularly drill mild steel, stainless, and other tough alloys and want a full inch-based range with durable bits. The tougher M35 alloy and split point geometry are practical for drilling through stock where heat and wear are recurring issues.

Casual users who only drill wood or soft plastics might find this overkill; if you rarely work with metal a simpler HSS set would be more cost-effective. Also, those needing metric sizes or very long-reach bits should look elsewhere.

Pros & Cons

Pros

• Excellent cutting performance in steel due to M35 cobalt construction and sharp points.
• Very complete 1/16in to 1/2in range in handy 1/64in steps for precise size selection.
• Included biodegradable cutting fluid improves hole finish and tool life when tapping or drilling metals.
• Organized plastic index case makes storage and transport straightforward.

Cons

• Some users report mixed durability on the largest sizes, so heavy-duty production use might see occasional breakage.
• Round shanks are standard but may require adapters in some chucks that prefer hex or reduced-shank bits.

Specifications

Brand	Drill America
Set contents	29 M35 cobalt jobber bits, 1/16in to 1/2in in 1/64in increments
Tip angle	135-degree split point
Finish	Gold oxide
Cutting fluid	4 oz biodegradable Tap Magic cutting fluid
Case type	Round plastic index case with labeled compartments
Specification standard	Meets ANSI specifications

Our Verdict

The Drill America 29 Piece M35 Cobalt set is a strong value for anyone who regularly drills metals and needs a full inch-based selection. The combination of M35 cobalt, 135-degree split points, and included cutting fluid makes it a practical kit for workshops and serious hobbyists, offering reliable performance and good organization for the price.

Frequently Asked Questions

Are these bits good for stainless steel?
Yes, the M35 cobalt construction and split point geometry make them suitable for stainless and other hard alloys.

Does the set include cutting fluid?
Yes, a 4 oz biodegradable Tap Magic cutting fluid is included to reduce heat and improve finish when drilling and tapping.

Do the bits fit standard chucks?
Yes, the bits have round shanks to fit most drill chucks; adapters may be needed for quick-change hex systems.