About suitability for sawing nails - fairy tales. The resource is small. I used it on an adjustable angle grinder, at low speeds, and in this mode, I died pretty quickly. The price for him is 400 maximum. Suitable only for work where there is no other way . For example, it is great for trimming an already laid floor, when nothing but a grinder or a renovator can crawl up. Or for inserting into a wall of plywood and OSB, when there is a risk of screwing up the circular with nails and self-tapping screws.