Impact drivers are a great way to drive screws very fast. An impact driver is very similar to the impact wrench that we have all see removing the lug nuts from your wheels when you are getting tires. We have all spent the time and sweat loosening the lug nuts and then we are amazed how an impact wrench can zip the nuts off. Impact Drivers give you similar speed when working on a project or doing a job. They are a huge time saver.