Metric 25Pcs M35 Cobalt Drill Bit Set 1.0mm-13.0mm - Durable Metal Kit

In this review the Metric 25Pcs M35 Cobalt Drill Bit Set is presented for hobbyists and tradespeople who need a full metric range of durable bits. The bottom line: this set is best for users who cut stainless steel, cast iron, aluminum and many softer metals or plastics and want a compact, indexed storage option. The review highlights the set's M35 cobalt construction and 135 degree split-point tip as the single biggest reasons to buy, since those features deliver faster cutting and improved centering when drilling hardened or abrasive materials.

Key Features

• M35 cobalt construction: provides increased toughness and heat resistance for drilling stainless steel and other hard materials without losing sharpness quickly.
• 25 metric sizes: includes sizes from 1.0mm to 13.0mm so a broad range of hole diameters are available without needing to mix sets.
• 135 degree split-point tip: self-centers and reduces walk-off while allowing faster penetration into metal and fewer pilot holes.
• Twist flute design: clears chips and debris efficiently for smoother drilling and less clogging in metal and plastic work.
• Hardened and polished shanks: improve cutting precision and reduce wobble for cleaner holes in thin and thick materials.
• Metal index storage box: compact case with size labels keeps bits organized and protects tips in a toolbox or on the bench.

Who It's For

This set is ideal for metalworkers, mechanics, fabricators and dedicated DIYers who frequently drill stainless steel, cast iron, copper or aluminum and need a complete metric assortment. The M35 cobalt material and split-point geometry suit users who work on tougher stock where standard high speed steel bits would blunt quickly.

It is less suitable for people who only drill soft wood occasionally or who need specialized bits for quenched or hardened fasteners, since the product is not intended for hardened bolts. Buyers who require imperial sizes or carbide-specific tooling should look elsewhere.

Pros & Cons

Pros

• Wide metric range from 1.0mm to 13.0mm covers most common drilling needs.
• M35 cobalt composition and polished flutes maintain sharpness and cut efficiently into stainless and cast iron.
• Sturdy indexed metal case keeps the set organized and easy to transport.
• 135 degree split-point design improves centering and reduces the need for pilot holes.

Cons

• Not designed for drilling quenched or heavily hardened bolts, limiting use in some specialty repairs.
• Durability impressions vary by user and heavy industrial use may show wear faster than luxury-grade tooling.

Specifications

Our Verdict

The Metric 25Pcs M35 Cobalt Drill Bit Set is a solid value for anyone who regularly drills metal and wants a complete metric range in one compact kit. Its M35 cobalt build, split-point tips and polished flutes make it a reliable everyday set for workshop and jobsite tasks, while the indexed metal case keeps bits protected and organized. For general metalwork and serious DIY projects this set delivers dependable performance without premium pricing.

Frequently Asked Questions

Can these bits drill stainless steel?
Yes, the M35 cobalt construction and 135 degree tip are suitable for drilling stainless steel and other hard metals.

Are imperial sizes included?
No, the set contains only metric sizes from 1.0mm through 13.0mm.

Can they be used on hardened bolts?
No, the set is not intended for quenched or heavily hardened bolts and may not perform well on that material.