3/4 Cobalt Drill Bits 3 Pack 6in - Durable Metal Drilling

In this review of the 3/4 Cobalt Drill Bits 3 Pack, the bottom line is simple: these bits are aimed at mechanics, fabricators, and DIYers who need reliable cutting through hard metals. The reviewer found the M35 cobalt construction and 135 split point deliver accurate starts and consistent hole quality in stainless, cast iron, and hardened steel when used at appropriate speeds, and the included storage case keeps the set organized. For anyone drilling thicker metal and seeking a compact, job-ready kit, this set is worth considering.

Key Features

• 3 pack 3/4 in size: Three 3/4 in diameter bits cover repeat jobs and provide backups when working through hard materials.
• M35 with 5% cobalt: The alloy mix gives improved heat and wear resistance for drilling tougher metals than standard HSS.
• Fully ground, 135 split point: The split point reduces walking and makes it easier to drill repeated holes without a pilot.
• 6 in total length with 3 in flute: The 3 in flute length balances chip removal and rigidity for deeper holes in plate and block materials.
• Plastic storage case included: A durable case protects the bits in a toolbox and keeps sizes organized for fast access on the job.

Who It's For

The set is best for tradespeople and serious hobbyists who frequently drill metal: sheet metal workers, auto repair techs, and machinists doing field repairs will appreciate the cobalt alloy and split point for clean starts in stainless and hardened steel. The 3/4 in diameter specifically suits larger through-holes for bolts, fittings, and plumbing work.

It is less appropriate for casual users who only drill wood or plastic, or for projects needing exceptionally long reach or specialized coatings. If you need a wide range of sizes or carbide specialty bits, look elsewhere rather than relying on this single-size pack.

Pros & Cons

Pros

• High-performance M35 cobalt alloy resists heat and holds an edge better than standard HSS.
• 135 split point promotes accurate starts and reduces the need for pilot holes on metal.
• Three-bit pack plus durable plastic case offers value and convenient storage for jobsite use.
• 6 in overall length with 3 in flute provides a good balance of reach and rigidity for many metal tasks.

Cons

• Some users reported mixed durability under extreme stress, so these may not match carbide in the toughest industrial scenarios.

Specifications

Diameter	3/4 in
Pack quantity	3 bits
Total length	6 in
Flute length	3 in
Material	M35 cobalt (contains 5% cobalt)
Point style	135 split point, fully ground
Storage	Durable plastic case included

Our Verdict

The Narwhal 3/4 Cobalt Drill Bits 3 Pack is a practical, cost-effective choice for anyone who regularly drills metal and needs reliable starts and edge retention. With M35 construction, a 135 split point, and a protective case, it delivers strong value for mechanical and fabrication work while offering backups in a compact kit.

Frequently Asked Questions

Are these bits suitable for stainless steel?
Yes. The M35 cobalt alloy and split point design make them well suited to stainless and other hard metals when used at appropriate speeds and lubrication.

Does the set include a case?
Yes. The pack ships with an incredibly tough plastic storage case to keep the bits organized and protected.

Can these replace carbide bits for all jobs?
No. They perform very well for many metal applications, but carbide may be better for extremely abrasive or high-production industrial cutting.