What a great idea to have a drill and hex drive tap that can be used in a drill. A real time saver. These come in handy as you don't need a faucet handle and you don't have to worry about how big a pilot hole you need to make. A good selection of the most common mounting screw sizes. They work well on thin material when working at low speeds. I wouldn't recommend it if you have very thick material as a regular tap will work better. Also, you should use cutting oil or other thread lubricant to extend the life of your tap. One complaint I have is that the size markings are almost impossible to read, it's an engraved seal which is very faint.