Internal Torx, External Hex, TX, Hex, External Torx
Imperial, AF, Torx, SAE, Metric
9/16 ", 15 mm, 15/16 ", 3/16 ", 7/16 "
1-1/2, 3/4, 1, 2-1/2, 3/8
6.35, 38.1, 25.4, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide