29Pcs Cobalt Drill Bit Set (1/16in-1/2in) - Durable M35 HSS Bits

Our review of the 29Pcs Cobalt Drill Bit Set finds it best suited to hobbyists and tradespeople who need a wide range of precise sizes for drilling into metals and general workshop use. The single biggest reason to buy is the comprehensive size selection packaged in a metal index box, which keeps all bits organized and easy to find; the set's M35 cobalt construction also makes it a practical choice for cutting stainless steel and other hard materials without constantly swapping tools.

Key Features

• Size range: Contains 29 sizes from 1/16in to 1/2in, so users rarely need an extra bit for common metal and wood jobs.
• M35 cobalt construction: Offers improved hardness and heat resistance for drilling stainless steel, cast iron and other tougher metals.
• 135 degree point tip: The split-style point helps with self-centering and reduces walk-off when starting holes in metal.
• Jobber twist length: Standard twist jobber lengths balance reach and rigidity for general workshop drilling tasks.
• Metal index storage box: A durable tray with size markings keeps bits organized and protects smaller sizes from damage.

Who It's For

This set is for DIYers, mechanics and metalworkers who want a single, compact kit that covers a wide range of fractional sizes for projects that include stainless steel, iron castings, aluminum, copper, plastics and wood. The included sizes and the HSS cobalt material make it a good everyday companion for jobs that require better wear resistance than standard high-speed steel bits.

Those who primarily drill large-diameter holes, require specialized coatings, or need industrial production-grade tooling with guaranteed longevity under continuous heavy use should consider higher-end or coated specialty bits instead.

Pros & Cons

Pros

• Comprehensive 29-piece range covers many fractional sizes not always offered in small kits.
• M35 cobalt alloy provides sharper cutting edge and better heat resistance than plain HSS for metals.
• Metal storage box with size index makes organization straightforward and protects bits between jobs.

Cons

• Some customers report mixed durability on the smallest bits, which can break under heavy side load or misuse.

Specifications

Our Verdict

The 29Pcs Cobalt Drill Bit Set is a practical, value-focused kit for those who work on a variety of materials and need many fractional sizes in one box; its M35 cobalt construction and the metal index storage make it a sensible purchase for workshop use, though users should treat the smallest bits carefully to avoid breakage.

Frequently Asked Questions

Are these bits suitable for stainless steel?
Yes. The M35 cobalt composition and 135 degree tip are designed for drilling stainless steel and other hard metals.

Does the set include metric sizes?
No. The set contains 29 fractional inch sizes ranging from 1/16in to 1/2in.

Is there any warranty or return policy?
The brand offers a 100% refund or replacement if you are not satisfied with the product.