Internal Torx, Internal Hex, External Hex, Hex, TX
AF, Torx, Imperial, SAE, Metric
15/16 ", 7/16 ", 5/16 ", 11/16 ", 23 mm
1/2, 1, 3/4, 1-1/2, 2-1/2
38.1, 6.35, 12.5, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide