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

Does what I needed but be gental with them

Very hand little drills

Seem ok only used one drill so far but it works fine

Great for drilling clean, precise holes in bone dry and bisque pottery. Not tried high-fired yet, but I imagine these drill bits will have no problem with that either. Excellent value for money.

excellent service and product

When these turned up, they were in a nice little presentation box, and they are colour coded (different colours for the different sizes) for ease of selection.I can't comment on the quality/strength of the drill bits as I bought them to check the size of my 3d printer nozzles (it's far easier to pop my digital calipers on the external size of the drill bits than to try and caliper the inside of the nozzle!)That being said; when I put my calipers on the drill bits, they were within 0.05mm of the advertised sizes (which I think is within tolerance, and is fine for me).The only downside for me is the writing on the shank of the drill bits - it's quite unclear - but as I have a set of digital calipers, it doesn't really bother me.I would recommend these drill bits to anyone wanting them to size up 3d printer nozzles.

That's exactly what I needed to make my ship model .Thank you Amazon.

I used these for cleaning out the jets on a carburettor from a lawnmower that had become blocked because it was stored with old fuel in it. They did the job perfectly.