Internal Torx, Internal Hex, External Hex, Hex, TX
AF, Imperial, Torx, Metric, SAE
15/16 ", 7/8 ", 5 mm, 3/8 ", 23 mm
1-1/2, 1, 3/4, 2-1/2, 1/2
25.4, 38.1, 19.05, 9.53, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide