My husband and I were doing repairs in the country, he was busy sent me to the store to buy a set of drills. I bought this set, Bosch after all, quality, everything. In the set itself, as I later found out, there are several types of drills: for stone / concrete, for metal, for wood. We had to mainly drill wood, so these were the most common samples. I did some drilling operations myself, so I can say that the drills are quite adequate for this price, the holes were made with a Bosch screwdriver, too, and these drills bite into the tree quite briskly, I must say. As for metal and stone, my husband already worked here, but he seemed to say that the drills would be quite suitable for such a price. The advantage will probably be that there are drills that are not multiples of a millimeter, very often it helps out at some points. Also in the set there are bits of different types. This is probably more of a plus for me, since I often use Chinese technology, and they always use some obscure bolts during assembly, in general, this kit solves this problem. Plus, the set includes nozzles for a screwdriver for hex fasteners. In general, I can say that my husband is satisfied with the set, there are no complaints, everything works fine, Bosch. I recommend!