Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, Torx, AF, SAE, Metric
7/16 ", 11/16 ", 5/16 ", 9/16 ", 32 mm
3/4, 1-1/2, 2-1/2, 1/2, 3/8
25.4, 9.53, 19.05, 38.1, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide