Bosch 29 pc Screwdriver Bit Set

A compact kit that solves more problems than you’d expect

I picked up this 29-piece Bosch bit set looking for a compact kit to throw in my drill bag for oddball fasteners I run into on site and during appliance repairs. After a few weeks of use across cabinetry, electronics teardown, and a couple of light automotive tasks, it’s clear this isn’t your typical “general homeowner” assortment. It leans heavily into security and specialty drives, and that focus is both its biggest strength and the reason you’ll still want a separate everyday set.

What you get

The set includes:
- A magnetic screwdriver handle
- A magnetic bit holder
- A socket adapter (1/4" hex to 1/4" square drive for standard sockets)
- A range of bits in the following types and sizes:
- Torx security (pin-in): T9H, T10H, T15H, T20H, T25H, T27H, T30H, T40H
- Pozidriv: PZ2
- Robertson/square: R1, R2
- Torq‑set: #5, #8
- Tri‑metal: #4, #5, #6, #8, #10
- Security hex (inch): 1/8", 9/64", 5/32", 3/16", 7/32", 1/4", 5/16", 3/8"

The “extra‑hard” designation is typical for Bosch’s S2-grade bits. In hand, the bits feel robust, with clean machining at the tips and consistent finish. The magnetic screwdriver has a positive detent for bit retention, and the bit holder’s magnet is strong enough to keep a #8 x 2" screw attached without drama.

Fit, finish, and ergonomics

Bit fit is the first thing I check. The Torx security bits engage snugly, with minimal lash and no burrs at the lobes. The center holes on the “H” Torx sizes are concentric and deep enough that the bits don’t bottom out on the security pin prematurely—something I’ve seen on cheaper sets. The Robertson bits (R1, R2) slot into cabinet screws cleanly, and the PZ2 is cut correctly for Pozidriv heads, not a sloppy hybrid that tries to do Phillips duty.

The magnetic screwdriver handle is compact and comfortable enough for light-duty work—panel covers, outlet plates, electronics housings—but the grip is clearly designed for control, not brute force. The bit holder seats tightly in drill/driver chucks and runs true with only a trace of wobble. The socket adapter has the usual bit of play at the square drive, which you’ll notice when spinning fasteners quickly, but it’s within the normal range and hasn’t caused me issues.

Performance under real use

I ran the T25H, T27H, and T30H bits hard on exterior screws and a couple of automotive interior fasteners. Using a standard 18V drill/driver (not an impact driver), the bits held their shape with no visible rounding after multiple drive and removal cycles. Edge definition remained crisp. On smaller electronics fasteners (T9H/T10H) I used the magnetic screwdriver handle to avoid over-torquing. Engagement was precise, and I didn’t experience cam-out as long as I kept steady axial pressure.

Security hex bits are where budget kits often stumble; the pin relief can be undersized or off-center. Here, the 3/16" and 1/4" sizes performed well on commercial hardware with security pins. The larger sizes (5/16", 3/8") are more niche, but it’s nice having them when you run into anchored fixtures or specialized hardware in commercial environments.

I wouldn’t categorize this as an impact-rated kit, and I didn’t use the bits in an impact driver. Kept to a drill/driver at reasonable clutch settings, they’ve held up. If you plan to hammer them with an impact driver daily, you’re looking for a different style of bit.

Selection and coverage

This is where the Bosch bit set makes its case. The security Torx coverage from T9H through T40H is excellent. That range spans small electronics up to larger automotive and equipment panels. The inclusion of Torq‑set and tri‑metal bits rounds out coverage for specialty fasteners you’ll find in appliances, avionics-adjacent hardware, and occasional consumer electronics.

On the other hand, it’s light on mainstream bits:
- There’s only a single Pozidriv (PZ2).
- There are no standard Phillips sizes (PH1/PH2/PH3).
- There are no slotted/flathead bits.
- The hex selection is security-only and inch-only; no metric hex.

If you’re hoping this can be your one-and-done bit set for household projects, that’s a stretch. It’s a specialty supplement first, a generalist kit second.

Day-to-day usability

The magnetic bit holder and screwdriver handle are genuinely useful. I ended up using the handle for delicate assemblies and tight spaces where a drill would be overkill. The magnet strength helps with small screws, and the bit swaps are quick. The socket adapter has already bailed me out when I needed to spin a 1/4" socket on an awkward bracket without fetching a separate ratchet.

Labeling is clear on the bits themselves, though as with any compact set, the tiniest sizes can be hard to read in poor light. I keep a silver paint pen handy to highlight the most-used sizes.

Durability so far

After several sessions driving Torx and square screws into hardwood and sheet metal, the bits are holding up. The black finish is wearing where you’d expect, but I’m not seeing premature rounding or chipping. As always, technique matters: set your clutch appropriately, keep the bit aligned in the fastener, and don’t lean on small security bits with more torque than the fastener warrants.

Where it shines

• Field service and maintenance techs who regularly encounter security fasteners.
• Electronics and appliance work where Torx security, Torq‑set, and tri‑metal fasteners appear.
• Automotive interiors and accessories that use T25/T27/T30 security screws.
• Mixed residential/commercial jobs requiring security hex in inch sizes.

Where it falls short

• General carpentry and household tasks that rely on Phillips and slotted screws.
• Metric-heavy environments (bikes, European fixtures) that need metric hex or Torx without security pins.
• Heavy impact-driver use; these aren’t positioned as impact-rated.

Practical tips from use

• For small security Torx (T9H–T15H), use the included screwdriver handle or set your drill’s clutch low to avoid stripping.
• If a security pin feels proud and the bit won’t seat fully, inspect the pin for damage; the bits are machined correctly, so the fastener may be the culprit.
• Keep a separate core set with PH1/PH2/PH3 and slotted sizes, then add this kit as your specialty extension.

The bottom line

The Bosch bit set is a well-made, thoughtfully curated specialty kit. The machining quality, particularly on the security Torx and security hex bits, inspires confidence, and the included magnetic driver, bit holder, and socket adapter make it genuinely useful out of the box. It’s not a universal solution—there’s a conspicuous lack of standard Phillips, slotted, and metric hex bits—but that’s by design. This is the kit you reach for when the usual bits don’t fit.

Recommendation: I recommend this set as a companion kit for anyone who regularly encounters security or specialty fasteners—maintenance techs, appliance and electronics tinkerers, and pros who work in mixed residential/commercial settings. It’s durable, the bit selection is intelligently skewed toward real-world security needs, and the included accessories add everyday utility. If you’re looking for a single all-purpose set for household projects, you’ll want to pair this with a basic Phillips/slotted/metric assortment. As a specialty add-on, though, it earns its spot in the toolbox.