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25 Pce 1mm - 13mm Metric Cobalt Tuffbox Jobber Drill Set Alpha SM25CO
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| Price for each item | Subtotal | % savings | ||
| Buy 1 | Buy 1 | $410.00 each | $410.00 | - |
| Buy 2 + | Buy 2 + | $390.00 each | $780.00 | 4.88% |
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In Stock
Other Sizes in Range
Delivery Information
Orders under $30 (Bulky items sent as parcel for FREE)
- Aust Post UNTRACKED Letter – FREE
- Parcel – From $8
- Express – From $10
- Click and Collect – 2hrs
Orders over $30
- Parcel – FREE
- Express – From $10
- Click and Collect – 2hrs
5% Off
10% Off
15% Off
| System of Measurement | Metric |
|---|---|
| Product | Drill Bit Set |
| Size Range | 1mm - 13mm |
| Sizes in Set | 1.0 - 13.0mm in 0.5 mm increments |
| Material | Co8 High Grade Cobalt |
| Suitable For | Stainless Steel and High Tensile Materials |
| Point | 135 deg. Split Point |
| Number of Pieces | 25 Drill Bits |
| Packaging | Plastic Tuffbox |
| Packaging Dimensions | 210H x 128W x 76D |
| Country of Origin | Made in China |
| Brand | Alpha |
Dimensional data is a guide only. Tolerance differences exist between brands and batches
About Drill Sets
Drill Sets are pre-packaged ranges of drill bits in a case that keeps the sizes sorted on site. BNA stocks Alpha 25-piece sets 1mm-13mm metric in Slimbox, Tuffbox HSS and Cobalt Tuffbox cases. Cheaper than buying each size individually, and one box keeps the range together so a missing 5mm bit doesn't stop the job.
Frequently Asked Questions
All 25 sizes in this metric (mm) set:
| 1.0mm | 1.5mm | 2.0mm | 2.5mm | 3.0mm |
| 3.5mm | 4.0mm | 4.5mm | 5.0mm | 5.5mm |
| 6.0mm | 6.5mm | 7.0mm | 7.5mm | 8.0mm |
| 8.5mm | 9.0mm | 9.5mm | 10.0mm | 10.5mm |
| 11.0mm | 11.5mm | 12.0mm | 12.5mm | 13.0mm |
This 25-piece range covers every common hole size for general fastener clearance. If a particular size wears out, individual replacement bits in the same series are available. Look under Jobber Drill Bits for the matching part number.
If most of your drilling is mild steel, framing or timber, HSS gives the best value. If you regularly drill stainless or hardened workpieces, the Cobalt set pays for itself by lasting longer. Many tradies keep both. HSS for everyday work, Cobalt for the stainless jobs.
The case holes are sized to the bit shank, not the cutting diameter, so replacement bits drop straight in. Replacing individuals means the case stays useful for years even when the cheaper sizes have been used up.
Tuffbox suits trade trucks and toolboxes where impact protection matters. Slimbox fits in a tool roll or apron pocket for site work where bulk is the enemy. Functionally both keep the bits sorted. Pick on storage style, not on the bits themselves.
Per-bit, a 25-piece set works out to 30-40% less than buying each size individually. The bigger win is workflow. A missing 5mm bit doesn't stop the job because you have the next size up to step the hole. The case stays useful even when half the bits are worn out.
Cutting fluid is the difference between a drill bit that lasts hundreds of holes and one that dulls after a few. In stainless it is non-negotiable. BNA stocks Cutting Compound in the same order if you don't have it. Aluminium can be drilled dry or with WD-40; cast iron drills dry; timber and plastic don't need it.
Quick pick for Drill Sets (what BNA stocks):
| If you are drilling | Pick | Why |
|---|---|---|
| Steel, wood, plastic, light stainless - everyday drilling | Alpha Gold | BNA's everyday production-grade Alpha Gold range. TiN coating lifts edge life roughly 30 percent over plain HSS. Best for steel, wood, plastic and light stainless work. |
| Hardened steel, cast iron, stainless steel, high-tensile work | Alpha Cobalt | Cobalt content lets the cutting edge run hotter without dulling. Where plain HSS anneals within a few holes in stainless, Alpha Cobalt cuts cleanly through hundreds. The standard upgrade for hardened steel, cast iron, stainless and high-tensile work. |
Material & Coating
HSS Cobalt M35 M35 high-speed steel with 5 percent cobalt addition. The cobalt content lifts the operating temperature range to approximately 700 degrees C, so the cutting edge survives stainless and hardened workpieces where standard HSS would anneal within a few holes.
Grade selection Stainless steel (304, 316, duplex), hardened plate, alloy steels and exotic metals like Inconel. The right choice when standard HSS is failing within a hole or two. Pays for itself in stainless work by lasting many times longer.
Important Cutting fluid is non-negotiable in stainless. Run 30 to 40 percent slower than mild steel. Keep the bit moving forward; stainless work-hardens if the cutting edge dwells in one spot.
Resources
For full technical data including key product information, range and a CAD drawing, see our Technical PDFs library.
Convert between metric and imperial sizes, gauge to mm, decimal to fraction and TPI to pitch with our measurement conversion calculators.
Not sure what 1/4" is in mm (or vice versa)? See our metric to imperial chart for the conversion every drill-bit size customers ask about.
About the Brand
Alpha · Sheffield Group · Australian
Alpha is the Sheffield Group's premium drilling, cutting and fastening brand. Australian-owned, Sheffield has supplied industrial and trade markets since 1957 and is one of the country's largest distributors of cutting tools and accessories.
Range: The Alpha range covers Gold Series HSS jobber drill bits, HSS Cobalt drill bits, Bi-Metal Cobalt holesaws, TurboBORE spade bits, heavy-duty timber augers, SDS Plus masonry bits, countersinks, ONSITE+ impact-rated step-tip drill bits, and the ThunderMax range of impact-driven accessories.
Positioning: Premium-quality, production-grade tools at trade pricing. Same-day dispatch from BNA Brisbane.
Pricing & Delivery
Includes GST, a Tax Invoice and Free Standard Delivery anywhere in Australia.
Buy with Confidence
15+ years selling online · 25,000+ stock lines · 200 million pieces ex-stock in Brisbane QLD.
Excellent on REVIEWS.ioTrusted by DIYers, tradespeople, builders, manufacturers, government, councils and engineers across Australia · Read reviewsDisclaimer
Technical data Researched and compiled from numerous industry sources for the sole purpose of providing basic information. All material is advisory only and its use by anyone is entirely voluntary. Reliance on it for any purpose by anyone is at the sole risk of that person, and Bolt and Nut Australia is not responsible for any loss, claim or damages arising therefrom. In developing this information, Bolt and Nut Australia has made a determined effort to present it accurately.
Measurements Sizes are taken from supplier catalogues or hand-measured and should be used as a guide. Minor variation between batches is normal. We only stock Alpha for this product; substituting another brand is rare and would always be confirmed with you first.
Product Photos & PDF Data Sheets Represent the product type, not exact size. PDFs are a reference guide only. Specifications may change without notice.
If you see any problems with any of our specifications or you require additional information please contact us.
Delivery
Weigh less than 500grams
Exceptions: Tools, Kits, Bulky items = Sent as a parcel with tracking
Small orders that fit into the slot of your Letterbox are sent:
FREE with Aust Post Letter delivery with NO TRACKING and delivery between 4-12 business days
Or
Select a Quicker delivery service
- $7.00 Parcel Delivery 2-7 business days
- From $12.00 Express Delivery 1-4 business days
- From $14.00 StarTrack PREMIUM Express Delivery 1-3 business days
Or
Click & Collect - Warehouse pickup
Unit 9, 93 Rivergate Place, Murarrie, QLDPlace your order online and we will have it ready within 2 hours. Call if required sooner
Pickup times between 8am - 4pm, Monday - Friday
Weigh more than 500grams
Included is orders under $30 but weigh more than 500grams or wont fit in the slot of your letterbox
Including Large and Bulky heavy orders are sent:
FREE as a Parcel Delivery WITH TRACKING and delivery between 2-7 business days
Or
Select an Express delivery service
- From $12.00 Express Delivery 1-4 business days
- From $14.00 StarTrack PREMIUM Express Delivery 1-3 business days
Or
Click & Collect - Warehouse pickup
Unit 9, 93 Rivergate Place, Murarrie, QLDPlace your order online and we will have it ready within 2 hours. Call if required sooner
Pickup times between 8am - 4pm, Monday - Friday
Further delivery information can be found on our Delivery page
Supplier Details
| MPN | SM25CO |
| UPC | 9342386014020 |
