Bosch 40-piece Driven Impact Screwdriving and Drilling Custom Case Set

Why I reached for this 40‑piece impact set

I’m a sucker for compact kits that actually cover the bases, and Bosch’s 40-piece impact set has been riding in my tool bag for the past month. I’ve used it for cabinet installs, a small deck repair, and a handful of punch-list tasks—drilling pilot holes, driving structural screws, and chasing the occasional Torx fastener on hardware. It’s a straightforward kit, but the mix of impact-rated bits, a few longer power bits, and a small run of black oxide drills makes it a practical “grab-and-go” solution.

What’s in the box and how it’s organized

The set includes:
- 23 insert bits (Phillips, Robertson/square, and Torx, plus a reduced P2 pair)
- 7 power bits in 2-inch lengths (common P2/P3, R2/R3, T25/T30)
- 8 black oxide drill bits from 1/16 in. to 1/4 in.
- A standard bit holder
- A compact case with tilt-in/tilt-out rails and rubber bumpers

The case is frankly better than I expected at this price tier. The tilt-in/tilt-out layout makes it dead simple to grab a bit with gloved hands, and the retention is tight enough that nothing rattled loose in my bag. The latch is positive, the hinge is solid, and the rubber bumpers help the case survive being tossed onto concrete. Visibility is good, and the laser-etched markings on the bits are far more durable than paint bands. My only nit: in low light, the dark etching on dark steel can still be hard to read. That’s a universal problem, but worth noting.

Bit fit and torque handling

Two things matter most for impact bits: tip geometry and how the shank handles torque spikes. On both counts, these bits did well.

• Precision-milled tips: The Phillips and Torx profiles seat cleanly with minimal wiggle. On #8 and #10 deck screws, the P2s engaged fully and resisted cam-out unless I got sloppy with alignment. The T25/T30 bits fit hardware snugly; I didn’t see the “ramps” that cause early slip on cheaper Torx profiles.
• Torsion zone and heat treatment: I ran a P2 and an R2 through framing screws in LVL and a couple dozen 3-1/2 in. structural screws into PT lumber. The torsion section visibly does its job—there’s a slight wind-up under heavy load that you can feel, which prevents the shank from snapping. After a couple days, I saw normal finish wear on the tips but the edges remained crisp.

The magnetic tips are strong enough to retain a fastener reliably overhead, though like most bit-level magnets, they won’t compensate for a sloppy start. I prefer to keep a sleeve-style magnet handy for oddball situations, but I didn’t miss it on standard work.

About that “reduced” P2

The set includes two “reduced” P2 bits. In practice, they’re handy for tighter recesses and certain coated deck screws that have slightly narrower entries. I used one on composite deck screws and got noticeably better engagement with less cam-out than a standard P2. If you drive a lot of exterior screws, you’ll like having those in the kit.

Drilling performance: good for wood and mild steel

The black oxide drill bits cover the common small sizes: 1/16 in. and 3/32 in. duplicates, then 1/8, 5/32, 3/16, and 1/4 in. They’re impact-driver compatible via the 1/4 in. hex interface, which is convenient when you don’t have a drill on hand. Black oxide is a sensible choice here—affordable, decent wear resistance, and ideal for wood, plastics, and mild steel.

In use:
- In SPF studs and cabinet plywood, the bits cut cleanly without burning when run at medium speed.
- In mild steel angle, the 1/8 in. and 3/16 in. bits worked fine with a dab of oil and low RPM. The 1/4 in. bit managed the job but needed patience and proper pressure. This is not a stainless or hardened steel set, and it doesn’t pretend to be.
- The duplicates in the smallest sizes are appreciated; those are the first to break if you bind them.

If you routinely drill metal or need faster penetration and longer life, step up to a titanium or cobalt set. For quick pilot holes and utility drilling with an impact driver, these are perfectly serviceable.

The case is a genuine productivity boost

Organization sounds boring until you spend ten minutes digging for a T25. Here, the tilt-in/tilt-out rails make all the difference—bits pop out with a controlled hinge action, and they go back in the same way. The layout also keeps the 2-inch power bits visible and accessible rather than buried under inserts. I’ve dropped the closed case from waist height twice; nothing spilled, and the hinge remained tight.

The only omission is a dedicated slot for a few common short screws. Some “combo” cases include a small parts bay; this one doesn’t. Not a deal-breaker, but it would have rounded out the grab-and-go story.

Selection and gaps

Coverage is good for general carpentry and maintenance, with plenty of P2, R2, T25—the fasteners you actually meet in the wild. Still, a few quirks stood out:

• Torx range: T20, T25, T30, T40 are present, but there’s a curious T5 insert. That size is more at home in electronics than on an impact driver. I would trade the T5 for a T15, which I encounter far more often on hinges and light hardware.
• No nut drivers: If you do electrical or HVAC work, you might miss 1/4 in. and 5/16 in. magnetic nut drivers. You’ll need a separate set.
• Limited power bits: The seven 2-inch bits cover the basics, but a 2-inch R1 or T20 would have broadened utility for hardware in tight spots.

None of these are deal-breakers, but they’re worth keeping in mind based on your work.

Day-to-day use

Highlights from my time with the set:
- Driving: The P2 and R2 bits took the brunt of the work—cabinet screws, construction screws into LVL, and pocket-hole screws. Cam-out was rare when I kept the driver aligned, and I didn’t snap any bits.
- Overhead work: Magnetic tips saved a few dropped screws, especially on tall cabinet faces. The 2-inch power bits gave me the reach to clear a chuck housing without resorting to an extension.
- Drilling: The 1/8 in. and 5/32 in. bits were my go-to for pilot holes in hardwood face frames. Clean holes and no wandering with a light center punch.
- Wear: After a few weeks, the black oxide finish shows expected polishing, but the working edges remain intact. No mushrooming or torsion fractures so far.

Who it suits best

• General carpentry and remodeling
• Facilities maintenance and service techs who prefer a compact, all-in-one kit
• DIYers who want one case to handle most household drilling and driving

If your work leans heavily into metal fabrication, electrical with lots of nut-driving, or specialty fasteners, consider augmenting this with a dedicated set tailored to those tasks.

Pros and cons

Pros
- Durable impact-rated bits with a real torsion zone that absorbs torque spikes
- Clean, precise tip geometry reduces cam-out
- Magnetic tips are legitimately helpful, especially overhead
- Practical drill bit selection for wood and mild steel
- Excellent case with tilt-in/tilt-out rails and secure latch
- Laser-etched markings hold up to jobsite wear

Cons
- Odd inclusion of a T5 instead of the more useful T15
- No nut drivers or parts bay
- Black oxide drills aren’t the right choice for hard metals
- Limited selection of 2-inch power bits

Recommendation

I recommend the Bosch 40-piece impact set as a well-balanced, everyday kit for carpenters, remodelers, and serious DIYers. The bits hold up under impact torque, the tip fit is reliable, and the case genuinely speeds up work. You’ll want to add nut drivers and, if you drill a lot of metal, a titanium or cobalt set. But as a compact, go-anywhere core kit that covers the screws and pilot holes you face most often, this one earns a spot in the bag.