Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, Torx, AF, SAE, Metric
7/16 ", 5/16 ", 7 mm, 14 mm, 11/16 "
1/2, 1, 2-1/2, 1/4, 1-1/2
9.53, 19.05, 6.35, 38.1, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide