qiipii Precision S2 Steel 4mm screwdriver bit set 38pcs - Phillips 000 00 and more, Flathead, Torx 2 3 4 5 6, Torx Security, Pentalobem, Hex, Tri-Wing, Triangle, U-shaped Bits in Case Collection

The Context: Over years of working on electronics and small hardware, I’ve managed to lose or wear down the most common bits in my precision driver kit. I picked this 38-piece set specifically to replace those missing pieces without having to buy an entirely new handle and case. The Performance: Material Quality: The S2 steel is the standout feature here. These bits feel much tougher than the "soft" bits that often come with budget kits. I used the Phillips #00 and #000 on some small electronics, and the fit was tight with zero cam-out. Precision Machining: The tips are crisp and well-defined. Even the smallest flatheads have sharp edges that grab the screw head securely. Variety: The selection is well-balanced. It covers all the "essentials" that tend to go missing first, like the tiny Phillips and Flathead sizes used in laptops, glasses, and small household tech. Pros: Value: A very cost-effective way to "rebuild" a high-end kit. Standard Fit: The 4mm hex shank fits perfectly in my existing precision drivers. Durability: The S2 steel resists rounding off, even on stubborn, over-tightened screws. Cons: None. The Verdict: If you have a favorite precision driver but are missing a few key sizes, this is the perfect solution. The steel quality is excellent for the price, and the accuracy of the bit sizing is spot on.

These holders are for 4mm Hex Bits, not for the more common 1/4" (6.35mm) Hex Bits. Securely holding 10 bits per base these cases are a good value if you have a lot of bits and want them organized. I plan on getting some sort of elastic keeper to keep them together. The bits are held securely yet are able to be removed easily. They fit my ~28mm (~1 1/8") Wiha bits perfectly. They do seem like they will hold up to some use, but time will tell just how well made they are. Overall, the fit, functionality, and quality meet my expectations.

Mostly a great product, but has a few flaws. First being that it doesn't fit all 4mm bits, due to assumptions about length of the bits. The current design has end bumpers (not just side bumpers to separate bits from each other). If they just removed those end bumpers, then double-ended bits like like Olight/Oknife uses would fit. (the single ended bits from Roxon do fit). I also wish it had a single spot that was big enough for a 1/4" bit, to fit a 1/4" adaptor that can hold 4mm bits. Those two changes would make this little organizer a 5 star product! I also, separately, wish they made a separate version for 1/4" bits. Especially if one spot was big enough to hold an adaptor that can hold 1/4" bits for use in a 4mm bit driver. I would buy such a product in a heart-beat!

The base is not 4mm on all the pieces. Some are 4.2 and do not fit in my screw driver. About half are too big and half just fine. There does not seem to be a pattern. Looks to just be poor manufacturing. Disappointed as these are exactly what I needed.

They seem very nice so far. I got 40 bits instead of 38.

It works well for my 4 mm screwdriver

Some of the bits are slightly too large and don’t fit my screwdriver

the tips are well defined, work good!

does the job

4mm Mikrobits werden sicher und übersichtlich aufbewahrt.

really impressive. The bits feel solid and durable, and the S2 steel holds up well even with tough screws. I love the variety—Phillips, Torx, Hex, Tri-Wing, and more—so I have the right bit for almost any job. The case keeps everything organized and easy to carry around. Overall, it’s a versatile, high-quality set that’s perfect for electronics, gadgets, and small household projects.

Great range of precision bits. I put the 10 I would use mostly into the case for my EDC pouch, and they fit perfectly with my 711l pendriver TG

Only 8 bits delivered complete scam