Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, Metric, AF, Torx, SAE
15/16 ", 7/8 ", 9/16 ", 3/16 ", 11/16 "
12.5, 38.1, 9.53, 6.35, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide