TEKTON 2928 14-Piece Power Nut Driver Bit Set N/A Imported Universal fit 1/4-Inch hex shank power nut drivers without detents Forged and hardened chrome vanadium steel Corrosion-resistant sandblasted finish (7) Power Nut Driver Bits (Inch): 3/16, 1/4, 9/32, 5/16, 11/32, 3/8, 7/16-Inch (7) Power Nut Driver Bits (Metric): 5, 5.5, 6, 7, 8, 10, 12 mm