Shank Tungsten Carbide Micro Drill Bits Set, Tungsten Steel PCB Print Circuit Board Flute CNC Router Bits for Rough Stone Print Circuit Board Jewelry Engraving (60 Pcs, 0.1-1.0 mm)

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.

Just what I needed / wanted at a fair price

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.

Awesome drill set for small jobs

Nice little set

These are perfect for the plastic model builder. Sharp enough so you can just use your fingers to drill the hole. No drill or Dremel needed. Can't say how well they work on other materials but a great addition to your model building supplies.

I guess I am dumb as a rock because I cant open the sets.I received three identical sets.

you will need a small drill. using a normal size drill will make them break. good price. quick ship