External Torx, External Hex, Internal Torx, Hex, TX
Torx, Metric, AF, Imperial, SAE
5.5 mm, 5/16 ", 7/16 ", 7/32 ", 15/16 "
1/2, 1/4, 1-1/2, 3/8, 2-1/2
19.05, 25.4, 38.1, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide