11/16 in Drill Bit 3 Pack - M35 Cobalt TiAIN, 6 in Length

In this review we look at the 11/16 in Drill Bit 3 Pack and who will get the most from these bits. The bottom line: these are heavy-duty, industrial-style bits intended for tradespeople and serious hobbyists who need an 11/16 in diameter that will cut into metal, steel and aluminum without excessive chatter. The combination of a 3 in flute length, 6 in total length and a professional M35 cobalt core with TiAIN coating makes the set worth considering when drill accuracy and edge retention are priorities.

Key Features

• 11/16 in diameter and 6 in overall length: Provides a full 3 in flute or working length while keeping a long reach for bolted or recessed holes.
• Rounded 11/16 in shank: The rounded shank fits into standard drill chucks and rotary hammers without special adapters for secure holding.
• M35 cobalt with TiAIN coating: The 5% cobalt alloy and titanium aluminum nitride finish increase hardness and oxidation resistance for extended bit life on hard metals.
• 135 degree split point: A split point tip reduces walking on tougher materials such as hardened and stainless steel for cleaner starts.
• Plastic storage case included: A simple case keeps the three bits organized and protected when not in use.

Who It's For

These bits suit mechanics, metalworkers, and contractors who frequently drill into steel, stainless, and aluminum and need a reliable 11/16 in option with a longer reach. The M35 cobalt core and TiAIN coating are aimed at people who expect better edge retention and oxidation resistance than general-purpose bits.

Those who only drill occasional soft-wood or light DIY projects, or need a variety pack of sizes, should look elsewhere; the set is a targeted size and grade rather than a general household assortment.

Pros & Cons

Pros

• High hardness and heat resistance from the M35 cobalt and TiAIN coating improves life under heavy use.
• The 135 degree split point helps start holes without walking on hardened materials.
• Long 6 in total length with 3 in flute gives access to recessed holes while maintaining rigidity.
• Included plastic case keeps the set together and protected on the job.

Cons

• Durability reports are mixed among users; some note breakage under extreme loads, so aggressive use on thick, hardened steel can still risk snapping.
• Only one size in the pack limits flexibility for general-purpose toolboxes.

Specifications

Diameter	11/16 in
Total length	6 in
Flute / working length	3 in
Material / grade	M35 cobalt with TiAIN coating
Tip angle	135 degree split point
Package	3 pack with plastic storage case

Our Verdict

For professionals and serious DIYers who need a dedicated 11/16 in drill bit that can tackle steel and aluminum, this M35 cobalt TiAIN set delivers solid cutting performance and good heat resistance at a reasonable value. The single-size pack and some mixed durability feedback mean it is best chosen when that specific diameter and increased hardness are required rather than as a universal choice.

Frequently Asked Questions

Can these bits be used in a hammer drill?
Yes, the rounded 11/16 in shank fits most drill chucks and rotary hammers, but use the proper speed and avoid hammer mode for metal drilling unless specified by your tool.

Are these bits suitable for stainless steel?
Yes, the M35 cobalt and 135 degree split point are designed to handle stainless and hardened steels more effectively than standard high speed steel bits.

Does the package include a case?
Yes, a plastic storage case is included to keep the three bits organized and protected.