DEWALT 1/4" + 5/16" & 3/8" + 7/16" Double Ended Nut Driver Set. The DEWALT IMPACT READY 2-piece double-ended nut setter impact driver bit set contains versatile bits you'll use in a wide variety of construction and home improvement projects. The nut setters securely fasten wood, metal, and other materials into a solid backing, without rounding the nut head. As part of the IMPACT READY line, this model delivers excellent performance in extreme-torque applications. They have detachable sockets for easy cleaning, and each bit is reversible for more versatility. Their industrial-strength magnet maximizes fastener retention. The bits have also undergone an advanced hardening process to resist the power of your impact driver