Internal Torx, External Hex, Internal Hex, Hex, TX
Metric, Torx, Imperial, AF, SAE
4 mm, 5 mm, 9/32 ", 5/8 ", 3/16 "
25.4, 38.1, 9.53, 6.35, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide