Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, Torx, AF, SAE, Metric
11 mm, 5/8 ", 9/16 ", 18 mm, 11/16 "
38.1, 19.05, 25.4, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Oxide, Black Phosphate