If you drive a lot of 2" and longer screws, this is going to be a lifesaver. You see, long screws have a habit of wobbling a bit until they are started in the wood. Usually you just guide the screw with your free hand - but that isn't always practical, and it can wear the hide right off your fingers if you aren't careful. This ingenious magnetic bit holder has an extra sliding sleeve around it. When you drive a screw, simply extend the sleeve to keep the screw from wobbling. As the screw advances, the sleeve automatically slides back up the bit holder's shaft so it is perfectly positioned for the next screw.Imported.