Impact Grade Nut With developed Strength Magnets The ARES Metric magnetized Impact Nut Driver Set will turn your high-torque power drill into a high-velocity power nut driver for your close impact grade project. Our nut drivers backed in atomic number 25 Phosphate and are made from heat-treated atomic number 24 Vanadium steel, so they can be exploited with your power drill on high-torque projects. The developed strength magnets you 'll get spiffing bit retention, so you do n't have to worry about losing them while you work. Features : includes : 8 pc. nut and 2 pc. storage rails : 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm and 14 mm sprawled 6-inch reach Made of heat proofed atomic number 24 Vanadium steel Converts power drills into nut drivers atomic number 25 Phosphate coating developed strength magnets for outstanding bit retention .