I needed torx bits that don't strip after a few uses to maintain my pocket knives. But didn't want to pay more for the name brands, specsilly since I already have a bit driver. Got this without much hope given the cheap price to test them out. But I was pleasantly surprised. These bits are hardened and good quality. They have not stripped, have an excellent grip and very tight tolerance.
Rating: [4 of 5 Stars!]