Internal Torx, Internal Hex, External Hex, TX, Hex
Imperial, Metric, AF, Torx, SAE
3/4 ", 5/16 ", 3/16 ", 11/16 ", 25 mm
1-1/2, 3/4, 1/2, 1, 2-1/2
12.5, 38.1, 9.53, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide