Lothee 60 Pcs Micro Drill Bits Set Tungsten Carbide PCB Jewelry,0.1-1.0 Mm

Great bits but the smallest are extremely fragile. One of the three sets I received had the .1mm - .3mm snapped off in the unopened case because the bits weren't tightly bound by the cases built in bit holders. You'll want to inspect them closely when they arrive because the smallest bits are so tiny, it's difficult to even see them thru the case plastic

This is exactly what I needed to drill out motorcycle jets. Motorcycle jets can cost up to eight dollars each and I have a bin full of different ones and now I can customize the exact tuning I need. The smallest jets are super small so of course you need to be extremely careful when you use them or they will break. Yet the quality is fantastic.

The only reason I didn't give it 5 stars is because, if you're like me, I skip over 5-star reviews. First off, the number of drills you get for the price is a great value. The sizes are actually noticeably different and color coded, though I didn't actually measure them. They come in a pack of three cases that stand upright for easy access. I personally use them to make hole for my 15mm cannon barrels on my tanks and they work beautifully. Little force to start and very sharp. You can even use some of the thinner drills to use om M.G.'s if you have magnified lenses and a steady hand. I would state that the thinner ones are very brittle, so a soft touch is extremely important when using them, but if you've ever used drill buts this thin, you should already know that. So, the only drawback for me is that the shanks are quite thick and takes a little bit umph to get them in my pin vice, but they are also long enough to use them by hand. Hope this helps.

Obviously for the tiny amount of material to make such precision modifications they are inherently delicate. But if you are tactful with your implementation, they are great. The bits are rather sharp. Aunt certainly sufficient for wood, plastic and softer metal. I use them enlarge some of the nozzles on the tip of GDI fuel injectors. I did break a couple bits figuring it out, but once I had everything stable it was smooth sailing

They're easy to break, but they do work with finesse! I bought these in an attempt to resize carburetor jets, and they worked wonders! The range in size is nice, and you get enough of all of them to break one and still be okay. Be careful with them, and they drill just fine.

BE AWARE: I ordered the 1.0 set of 60. I thought I would be getting a variety. Instead I got 6 packs of the same bits. The bits are pretty good, but very fragile. Be gentle with them or they will break.

This is the worst set of tungsten bits I’ve ever seen. Do not buy no matter what you do. They don’t even seem like they are tungsten- they are cheap whatever the hell material. I’ve had seven bits break. Stay away.

I purchased this set for PCB prototyping and small-scale engraving projects, and I'm genuinely impressed with the performance. The range from 0.1 mm to 3.0 mm covers everything I need for intricate work on circuit boards, jewelry, and even some softer stones. The tungsten carbide construction is solid and feels very durable. Even after multiple uses, the bits stay sharp with minimal signs of wear. I've used them in a CNC router, and they cut cleanly without chipping or skipping, even on delicate materials. What I appreciate most is the consistency—each bit is clearly labeled and fits snugly in my collet without wobbling. The storage case is also a nice bonus for keeping everything organized and safe. If you're doing precision drilling, engraving, or micro-routing, this set is a fantastic value for the price. Highly recommended for makers, hobbyists, and anyone working with fine detail.

So far this set of drill bits is turning out to be exactly what I was hoping for, awesome value for the money, would definitely by them again!?

Not as pictured. But still I can make do I use these all the time

excelente simplemente excelente