External Torx, External Hex, Internal Torx, TX, Hex
Torx, Imperial, AF, SAE, Metric
4 mm, 5/16 ", 7/16 ", 3/16 ", 7 mm
1/2, 1/4, 1-1/2, 2-1/2, 1
38.1, 9.53, 19.05, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Oxide, Black Phosphate