Magnetic-Nut-Driver-8mm-2-Piece-Blue Spot-Tools-14110-p-The-Blue Spot-Tools-Magnetic-Nut-Driver-is-manufactured-from-heat-treated-&-tempered-steel-alloy-for-increased-strength-&-durability-With-a-blackened-carbon-coating-to-protect-against-corrosion-Strong-magnets-hold-fasteners-securely-for-ease-of-use-p-p-It-has-a-1-4in-drive-ideal-for-use-with-electric-drills-&-screwdrivers-for-the-precise-driving-of-nuts-bolts-&-hex-head-screws-p-Blue Spot-Tools-14110-Magnetic-Nut-Driver