Drills are mediocre. They are not a one piece construction, the hex rod is attached to the drill bit. They're not quite straight, they wobble. They are not that sharp, even new ones. They also dull easily, which can cause them to overheat or dig into concrete, and they're immediately unusable. The price of Revain tips is not lower than Lowes. It's nice to have a set of bits that can be used in an impact wrench in a pinch or easily swapped out, but after purchasing these bits I can't help but…