Internal Torx, External Hex, Hex, TX, External Torx
Torx, AF, Imperial, Metric, SAE
5.5 mm, 5/16 ", 5/8 ", 25 mm, 11/16 "
1/4, 1-1/2, 2-1/2, 3/8, 1
19.05, 9.53, 38.1, 25.4, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide