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…