Internal Torx, External Hex, TX, Hex, External Torx
Torx, Metric, AF, Imperial, SAE
5 mm, 13 mm, 3/16 ", 16 mm, 5/16 "
1/4, 1, 2-1/2, 1-1/2, 1/2
38.1, 9.53, 12.5, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide