Twist Drill Bits, Mtsooning 10PCS 2.5mm Micro HSS Cobalt Metric Spiral Rotary Tool for Stainless Steel Wood Plastic Copper Aluminum Sets

Exactly what I needed. Exactly what I was expecting.

Could not even drill a test hole into a piece of wood to check for screw fitment. They have absolutely no cutting edge on the tip. I know they are cheap, but these should not be able to be called drill bits. Garbage!

Only drilled into plastic so far, but they're cheap. So if you break a few who cares. I ran them on my drill press. They seem to be concentric; I got them to drill into 3d prints so I can install M3 screws. The holes they created worked fine for that.

Nice sizes. So far so good. Too new to tell much else

started vibrating when i put mine on my rotary tool

Bought them for a project my daughter is working on with epoxy. I liked that they are pretty sharp and grab quickly in to the material. For the price you can't complain each time they break a bit. I can not give a review on how well they work on metal for I have not used them yet. As soon as I do I will update the review. They work great on wood and epoxy.

For the price, it is quite good value but each drill bit is not sharp enough.It might be work well with wood but not good enough with plastic and resin.If you pin vice, don't buy this. with drill machine, it is OK.

Drills are not even made correctly. Flutes are cut but the end of the drill isn't ground to an edge. see picture. They are so cheap most people will just throw them away. Don't buy these. If you do return them to Amazon. Replaced with uxcell bits that are made correctly.