Whether you’re a DIY enthusiast or a professional fabricator, choosing the right 0.11 inch (2.8 mm) drill bit can make a noticeable difference in hole quality and tool longevity. This guide highlights five top options designed for hard metals, plastic, wood, and more. Each pick targets different use cases—from heavy metalworking to general home projects—so you can match the bit to your needs. The top products are selected for durability, compatibility with standard drills, and ability to handle demanding materials without excessive wear.
Summary table of chosen products:
| Product | Best For | Key Benefit | Notes |
|---|---|---|---|
| Metal, stainless steel | M35 cobalt steel for high hardness and heat resistance | Set includes multiple bits; strong jobber length | |
| Metal and plastics | Straight shank for secure chucking | Identical two-pack | |
| Bulk metal drilling | Multiple bits for quick replacements | Value-oriented option | |
| Hard metals, no pre-drilling | 135° step point with TiAlN coating | Includes storage case | |
| General purpose, metals and plastics | Gold titanium & black nitride coated | 135° split point; versatile |
HARFINGTON 10pcs Cobalt Jobber Drill Bits 2.8mm
The HARFINGTON set is designed for hard materials. Constructed from M35 high speed steel, these bits offer high hardness, heat resistance, wear resistance, and longer service life. The 2.8 mm diameter and 60 mm total length provide a compact option for small-diameter holes in stainless steel and similar materials.
Best for metalworking, especially stainless steel and copper, with a focus on durability. The simple straight shank supports quick chucking in standard drills and minimizes slippage during drilling. A caution: while versatile, the 60 mm length may limit deeper hole work without backing support.
Who this is best for: hobbyists and professionals who need a reliable, cost-effective cobalt option for precision metal holes. Why selected: strong M35 cobalt core, good chip removal, and a secure chuck fit make it a solid all-around metal bit set.
MAXTOOL No.35 2pcs 0.110″ HSS Drill Bits (0.11″)
These straight-shank, jobber-length HSS bits are positioned as versatile for metal, plastic, and wood. They adhere to standard drill tolerances and offer consistent cutting performance with long tool life. The pair format makes them ready for back-to-back usage on multiple projects.
Best for: users who want a dependable, basic option for mixed-material drilling. Choose this if you frequently switch between metal and plastics and value a compact two-bit set for quick replacements. Caution: not cobalt-coated, so heat resistance may be lower than cobalt or TiN-coated options.
Why selected: straightforward design, reliable cutting performance, and standard shank compatibility support broad drill applications without special equipment.
MAXTOOL No.35 5pcs 0.110″ HSS Drill Bits
This set expands on the two-piece option, offering more immediate replacements for ongoing work. The HSS material supports cutting in metal, plastic, and wood with dependable performance. It follows standard tolerances aligned with ASME/ANSI B94.11M and USCTI guidelines.
Best for: workshop users who need a small, affordable batch of identical bits for continuous projects. Why selected: extra quantity reduces downtime from bit changes, maintaining workflow efficiency. Caution: as with any HSS bit, prolonged drilling in very hard metals may require cooling or lubrication to prevent heat buildup.
Crosstar 21Pc Cobalt Stepped Point Drill Bit Set
This 21-piece set emphasizes cobalt and advanced coatings for hardened metals. With 5% cobalt core and a TiAlN nano coating, these bits excel at drilling hard stainless steels and bearing steels, reducing wear and extending tool life. The 135° step drill head enables faster, start-free drilling and smoother hole enlargement.
Best for: heavy-duty metalwork and jobs requiring reliable performance on hardened materials. Why selected: the combination of cobalt content, TiAlN coating, and a 135° point design reduces pre-drilling needs and improves hole quality. Caution: the set’s breadth may be more than needed for occasional users; storage and organization matter due to the large number of bits.
uxcell 5pcs 2.8mm Straight Shank Bits
uxcell’s set provides a practical option with 2.8 mm bits featuring a 135° split point. The bits use gold titanium and black nitride coatings to enhance durability and wear resistance, along with a sturdy straight shank for reliable chucking in standard drills.
Best for: general-purpose drilling where a lightweight, coated option is preferred. Why selected: coating reduces friction and heat buildup, enhancing cutting performance in metal and plastics. Caution: ensure coolant or lubrication for extended drilling in very tough metals to maximize bit life.
Buying Guide
What to consider when choosing a 0.11 inch drill bit set:
- Material construction: For hardened metals, cobalt (M35) or TiAlN-coated HSS bits offer better heat resistance and longer life than standard HSS.
- Shank type and chuck compatibility: Straight shanks fit most drill chucks; ensure your drill can accommodate the 2.8 mm shank.
- Coatings: TiAlN coatings provide improved durability and heat resistance; traditional HSS is cheaper but may wear faster under heavy use.
- Bit geometry: 135° split-point bits reduce walking on startup; stepped-point bits enable faster hole enlargement with no pre-drilling.
- Set size and organization: More pieces mean more options but require storage; consider a case or indexed storage.
- Intended materials: Hard metals like stainless steel benefit from cobalt or coated bits, while wood and plastics may perform well with standard HSS.
Practical buying questions
- Do I drill mostly metal or a mix of materials? Choose cobalt or coated bits for metal-heavy work.
- Will I need many bits or just a few reliable options? Larger sets reduce replacements but require storage.
- Is pre-drilling required for my material? Step-point designs reduce or eliminate pre-drilling on many metals.
- What drill compatibility do I have? Ensure shank size matches your drill chuck and that length suits projects.
- How important is heat resistance? For high-temp or thick metals, cobalt and TiAlN coatings are beneficial.
Frequently asked questions
- What is the standard bit size for 0.11 inch drilling? A 2.8 mm diameter is the equivalent size commonly used in metric and imperial systems.
- Are cobalt bits worth the extra cost? Yes, for frequent drilling into hardened metals, cobalt offers longer life and better heat resistance.
- What is a straight shank bit best for? Stable chuck grip and predictable cutting performance on most drills.
- What does a 135° point mean? It starts cutting more easily and reduces walking, especially on metal surfaces.
- Should I oil or lubricate drilling? For metal, lubrication helps reduce heat and wear, extending bit life.
- Is a larger set better for beginners? A larger set provides versatility but may be more than needed for simple tasks.