With DEWALT bits, you can tighten every screw firmly. Whether you're working with a cross head, Torx, or other screw head, you'll always find the best bit. Choose a small set for simple jobs or a large set if you drive screws often. The more bits you have, the more different screwdriving jobs you can do. You receive a magnetic bit holder with most bit sets, so you can change bits superfast. The bits are strong and last a long time.