External Hex, Internal Torx, Internal Hex, Hex, TX
Torx, Metric, AF, Imperial, SAE
7/8 ", 3/16 ", 1-1/2 ", 9 mm, 11/16 "
38.1, 9.53, 19.05, 6.35, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide