Internal Hex, Internal Torx, External Hex, TX, Hex
Torx, AF, Imperial, SAE, Metric
6 mm, 7/16 ", 9/16 ", 15 mm, 3/4 "
25.4, 38.1, 6.35, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide