Internal Torx, Internal Hex, External Hex, Hex, TX
AF, Torx, Metric, Imperial, SAE
9 mm, 5/16 ", 7/16 ", 5/8 ", 11/16 "
3/4, 1, 1-1/2, 2-1/2, 1/2
6.35, 19.05, 9.53, 38.1, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide