Bosch Professional 2608587014 19-Piece HSS-Cobalt ProBox Metal Drill Bit Set (1mm–10mm)

What it is and what it’s for

This Bosch Professional 19-piece drill bit set is aimed at metal drilling, with bits made for stainless steel work “on paper” thanks to the HSS-Cobalt construction. If you regularly fit hardware, drill small holes for fixings, or do occasional stainless-related jobs, having a broad spread of diameters can be more useful than buying just a single bit.

The kit covers diameters from 1mm up to 10mm, using a range of sizes that many DIYers and workshop users actually reach for. It’s supplied in a ProBox style case, which matters if you’re tired of digging around for the right size or if you want bits protected between jobs.

That said, no kit like this is going to be perfect for every drilling scenario. If your projects demand very long, deep drilling, or you’re regularly doing high-volume production metalwork, you may find you need something more specialised than a general mixed-size set.

Where it stands out (the bits you can actually use)

A big part of the appeal is the coverage. You get 19 diameters: 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5 and 10.0.

It’s also nice that the set isn’t just “bits of the same length”. The working lengths vary across the range (for example, 12mm at 1mm, rising up through the sizes, and reaching longer lengths such as 87mm for the largest diameters listed). In day-to-day use, that can help when you’re drilling through thinner materials at small sizes, but still want enough reach when the job isn’t perfectly shallow.

Quick micro-example

Say you’re mounting a bracket and the pilot hole is too small. With this set, you can step from 2.5mm to 3.0mm (or whatever your clearance needs) without hunting for individual replacements. If you’re working with stainless steel, having HSS-Cobalt bits in the mix is the sort of detail that can reduce the “it just feels like it’s struggling” moments.

What to know about design and handling

Each bit is specified with a 135° point angle. That’s a practical geometry for metal drilling because it’s designed to start cleanly rather than wandering off your mark.

The bit set is described as being for drill drivers and is presented as an accessory pack for drilling in metals, including stainless steel. On a practical level, that usually means it’s intended for powered drilling rather than hand-drilling.

You may still want to keep expectations realistic: exact performance will depend a lot on your drill speed control, how you secure the workpiece, and whether you use proper technique (like starting with light pressure, keeping alignment, and managing heat). A good bit helps, but method matters just as much.

The essentials (sizes, working lengths, and kit dimensions)

Here are the concrete details included in the listing:

• Diameter options (mm): 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0, 5.5, 6.0, 6.5, 7.0, 7.5, 8.0, 8.5, 9.0, 9.5, 10.0
• Working lengths (mm) by diameter (as listed): 12, 18, 24, 30, 33, 39, 43, 47, 52, 57, 57, 63, 69, 69, 75, 75, 81, 81, 87
• Drill bit set dimensions (mm): 172.0 x 115.0 x 42.0

There’s also a mention of the kit being gold in colour in the product name, but the more useful takeaway is the spread of diameters and the fact the lengths are planned across that range.

Who it suits best (and who should be cautious)

It’s a solid fit if you want one set that covers the common metal hole sizes, from small pilot work up to mid-range fixings around the 8–10mm territory. You’ll like it if you frequently need “the next size up” mid-job, or if you’re setting yourself up for stainless steel jobs where standard bits may be less convincing.

It might not be the best choice if your work is very specialised or high-frequency and you already know the exact diameter(s) and lengths you need most. In that scenario, buying a single dedicated bit (or a more focused set) can be more efficient.

It may also not suit you if you’re expecting these to drill stainless effortlessly in every situation. In metal drilling, heat and pressure control are everything, even the right bit can underperform if the setup is off.

Compatibility & requirements

The listing frames these bits as accessories for drill drivers, which generally means you’ll use them with a suitable drill/driver and the correct chuck size. Make sure the chuck on your drill driver can securely hold the bit shank size for the diameters you plan to use. The kit is described for stainless steel, but your results will still depend heavily on how you clamp the workpiece and how you manage drilling speed and pressure.

Is it worth it?

Buying this Bosch Professional 19-piece HSS-Cobalt metal drill bit set makes sense if you want dependable coverage across 1mm–10mm for metal (including stainless steel) and you value having bits organised in a case. The variety of diameters, the consistent point angle specification (135°), and the mixed working lengths give it that “grab-and-go” feel for real jobs.

But don’t overthink it either: it’s more of a practical workshop set than a miracle tool. If you only ever drill one or two sizes, or you regularly need very specific lengths and depths beyond what’s listed, you may be better off buying a narrower selection.

Mini FAQ

Will this drill stainless steel?

The listing explicitly positions the set for stainless steel, and the bits are described as HSS-Cobalt, so it’s intended for that job. Exact results will still depend on your drilling technique and setup.

What sizes are included?

The kit includes 19 diameters: 1mm up to 10mm, in 0.5mm steps where listed (for example 1.5, 2.5, 3.5, 4.5, etc.).

Are the working lengths the same for every bit?

No—working lengths vary across the diameters, from shorter lengths at the smallest sizes up to longer lengths at the largest sizes as specified.

Is it suitable for a drill driver?

It’s described as accessories for drill drivers, so it’s intended for powered drilling. You’ll still want to ensure your drill driver can hold the bits securely.