Internal Hex, External Torx, Internal Torx, Hex, TX
Imperial, AF, Torx, Metric, SAE
9/32 ", 13/16 ", 7/8 ", 3/16 ", 23 mm
3/4, 1/4, 2-1/2, 1-1/2, 3/8
9.53, 25.4, 12.5, 38.1, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide