Internal Torx, Internal Hex, External Hex, Hex, TX
AF, Imperial, Torx, SAE, Metric
9 mm, 16 mm, 5/16 ", 5/8 ", 1-1/2 "
1-1/2, 2-1/2, 1/2, 3/8, 3/4
6.35, 19.05, 12.5, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide