Qibaok6 piece combination drill bit 1/4 inch HSS M3 – M10 screw hexagonal countersink drill bit set, titan machine thread drill bits for wood, plastic, aluminium, copper. Not for hard metal.

Do the job

These Tap Drills fit my needs perfectly They perform the task brilliantly, on the specified softer materials.I only wanted a Bit set to pilot/start Metric hand Tapping in soft metal, these perform that task extremely well, with a bonus of using them to cut a thread, in one hit. I think that I would only trust using their treading properties, on Wood. But I will practice on some scrap metal, to find out if they will cut a thread without stripping it, on withdrawing the drill bit, which is my concern. Minor Con - the Dill Bits are supplied in a cheap plastic case, shame. Overall highly recommended, great product, thank you.

not bad, But I have to say at present I have only used them to clean out threads in castings which was ok and no issuesfound, I have not as yet used them to make a new threaded hole.

if you're tapping anything thicker than 2mm they WILL break but for thin stuff they're not bad

At the price I'm happy. Using mainly to add threads to my 3d printed parts. It's doing very well.

Cool drill and tap Job Done

Have brought before, they are alright for lighter jobs

I like this bits mostly because of the 3 functions you can do in one go, Drilling, tapping and countersink, and you get all this for a good price.Fast delivery considering i live in a diferent country.