Internal Torx, External Hex, Hex, TX, External Torx
AF, Torx, Imperial, SAE, Metric
13/16 ", 3/16 ", 3/4 ", 33 mm, 11/16 "
3/4, 1, 2-1/2, 1-1/2, 3/8
12.5, 19.05, 6.35, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide