First 4 holes in 6mm: no problem
Then 4 holes in 3mm: already at the 2nd hole, the drill broke. And, although the cordless drill was not held with a great deal pressure or at an angle.
I have these 4 holes executed in 3.5mm, where there were no problems. The 2.5mm holes that I had then still drilled for testing, were not a problem.
So I'm assuming that it was a material error in the 3mm drill.
I have therefore complained about the set, but if I go out of it, that this is an isolated incident, I would recommend this set yet. As I said, all other used drills worked perfectly and were pleasantly sharp!
Therefore, I give the drill set 3 Stars: ***
