Best 1/8 Drill Bit Sets for Metal, Wood and More: Top Picks for Any Shop
Answering the essential question for buyers: which 1/8 inch drill bit set delivers reliable performance across common materials? This guide highlights five standout options, with clear reasons for each choice, so you can pick the best fit for your needs. Ideal for DIYers, professionals, and hobbyists working with steel, stainless, aluminum, wood, or plastics. Each product includes a quick snapshot of who it’s best for and a practical caveat to consider before you buy.
| Product | Best For | Key Benefit |
|---|---|---|
| RCINDUS (20PCS) 1/8″ Cobalt Drill Bit | General metalworking and tougher metals | 5% cobalt for harder cutting edge |
| Drill America – KFD1/8P12 | Versatile general purpose drilling | 135° split point for no-walk starting |
| DEWALT Drill Bit Set, 1/8″ (DD5108T) | Durable, high-performance sets | Tapered core for longevity |
| Bosch CO2135B 1/8 in. cobalt | Highly durable for hard metals | 8% cobalt alloy delivers extended life |
| Narwhal 1/8 Inch Cobalt Drill Bits (13 Pack) | Precision and organization for metal work | Fully grounded with 5% cobalt |
RCINDUS 1/8″ Cobalt Drill Bit, 20 Pieces
The RCINDUS set uses M35 cobalt high-speed steel with 5% cobalt, designed to handle harder metals and offer longer life than standard HSS. The 135° self-centering split-point helps prevent walking when starting holes in tough surfaces, making it well suited for steel, stainless, cast iron, and even hard plastics. Best for metal shops that need a broad set of 1/8″ bits for recurring projects. Caution: the bulk assortment may include bits with varying flute lengths; verify the length needs for your specific job.
Drill America KFD1/8P12 1/8″ HSS Drill Bit
This 12-piece set emphasizes versatility across wood, metal, stainless steel and other hard metals, with a 135° split point to minimize walking and improve accuracy at start. Best for general-purpose use where a reliable, uniform cutting edge is desired. Limitation: being a general-purpose set, it may not offer the extreme wear resistance of high-cobalt variants for repeated heavy-duty drilling.
DEWALT Drill Bit Set, 1/8″, 2-Piece
DEWALT’s two-piece set features a titanium nitride coating and a tapered core, focusing on durability and smoother chip evacuation. The pilot point helps start holes cleanly with less wandering, making it a strong choice for metalworking and light fabrication. Choose this if you value DEWALT’s engineering and want a compact, high-quality option for precision drilling. Caution: limited quantity may require purchasing a larger set for more 1/8″ options.
Bosch CO2135B 1/8 in. Cobalt M42 Drill Bit
Bosch uses an 8% cobalt M42 alloy, delivering exceptional life and heat resistance for stainless steel, cast iron, and other hard metals. This bit is designed for extended use in demanding applications, with high heat resistance and a durable jobber-length design. Best for professionals who drill frequently into hard metals. Limitation: higher cobalt content can come with a higher price and may be less flexible for light-duty jobs.
Narwhal 1/8″ Cobalt Drill Bits (13 Pack)
Narwhal’s 13-pack provides a comprehensive assortment of 1/8″ cobalt bits with full grounding and a 135° split point for easier drilling in harder materials. The included plastic storage case helps keep bits organized, reducing misplacement. Best for users who want a large, organized kit for metalworking and repeated drilling tasks. Caution: some users may prefer a smaller, lighter set for occasional use.
Buying Guide
What material and coating matter most?
For metal drilling, cobalt-containing bits (M35 or M42) provide greater red hardness and wear resistance than standard high-speed steel (HSS). M35 cobalt bits strike a balance between cost and performance, while M42 variants often offer longer life in hard metals. Titanium nitride coatings can further improve durability and reduce wear in tough materials.
Which point geometry works best?
A 135-degree split point helps the bit start accurately and reduces walking, especially on hard surfaces. This feature is advantageous when drilling stainless steel, cast iron, or hardened alloys. If you work with soft materials, a standard 118-degree point may be adequate but still benefits from a center point to prevent wandering.
Length and shank compatibility
Jobber-length bits can handle deeper holes and general-purpose drilling, while shorter bits fit tighter spaces. Check the flute length and total length to ensure compatibility with your drill press or handheld drill. Hex shanks or quick-change designs aid tool changes in rapid production environments.
Kit size and organization
Consider how many bits you need and whether a case or magnetic rack helps keep bits organized. Large sets are cost-effective for frequent users, while compact sets suit occasional projects or beginners.
Best practice tips
- Use proper speed settings for the material and bit diameter to maximize life and performance.
- Keep bits sharp; cobalt bits can be resharpened, but follow manufacturer guidance to prevent edge damage.
- Apply steady, moderate pressure and use lubrication when drilling metals to reduce heat buildup.
FAQ
- What is the advantage of cobalt drill bits over standard HSS? Cobalt bits retain hardness at higher temperatures, offering longer life and better performance in hardened metals.
- When should I choose a 135° split point? Use it to reduce walking and improve starting accuracy on hard metals like stainless steel and cast iron.
- Are broader 1/8″ sets worth it for beginners? Yes, they provide versatility for various materials, but beginners may start with a smaller, focused set and expand as needed.
- Can cobalt bits be sharpened? Many cobalt bits can be sharpened, but follow the manufacturer’s instructions to retain cutting geometry and edge durability.
- Which material is best for drilling aluminum? Carbide-tipped or cobalt bits perform well, with HSS suitable for light-duty aluminum in home projects.
- Do I need a special drill for cobalt bits? Standard drill chucks and cordless drills work, but ensure appropriate speed and lubrication to maximize life.