Tooluxe 10252L 5/16" Magnetic Nut Setters, 5 Count | 1/4" Quick-Change Hex Shank | 2-9/16" Length | CR-V Steel Five pack of 5/16 inch magnetic nut setters that is perfect for production work, sheet metal screws, and any other application using hexagonal head fasteners Made from cleanable sandblasted chrome vanadium steel for hardness, toughness, corrosion resistance, and stands up to the power of impact drills Universal 1/4" quick change six-point hex shank is 2-9/16" in length and will fit any electric drill or power screwdriver chuck Strong magnets inside each setter to hold bits and quick-change shank for fast swapping, one-handed use Corners of each precision machined hex are rounded so that each setter grabs hex nuts by the sides, reducing fastener wear and rounding