I have been using this set for 7 years. I use about 3 times a year for threading and about 10 times for cleaning threads. When I cut a thread, I observe the diameter of the drill required for this thread diameter, or I reduce the difference if there is no necessary drill, plus I drip oil onto the cutting site. Not a single tap or die was broken during this time. I use it in the garage. The best set in terms of quality and completeness. When I bought it, he had a price tag of 1800 in Leroy Merlin, I was completely satisfied, there was nothing like it in terms of price / quality ratio. Well, Sibrtech was still about 2 times cheaper, but I don’t buy a tool like this brand. I bought the same one for my father-in-law, he also did not break a single item. I decided to write this review, because. I began to look for such a set for a friend and saw a negative review by a previous commentator. Of course, I did not give the items from this set for testing to the laboratory for metal hardness, but I think the last commentator did too. And I didn’t have a chance to break off the tap with crooked hands, not observing the required diameter of the drill, and then I was very upset by this, up to writing a negative review about this set for such a period of time. Once upon a time I bought a set of Tivoli extractors of 4 pieces for more than 1000 and immediately broke off 2 extractors. It was around 2022. I was upset, it was embarrassing. But then he began to drill out the remains of this bolt and realized that the bolt had stuck tightly. The 2 remaining extractors are still alive, but I use them no more than once every couple of years.