Internal Hex, Internal Torx, External Hex, Hex, TX
Torx, AF, Metric, Imperial, SAE
3/16 ", 9 mm, 11/16 ", 26 mm, 35 mm
12.5, 25.4, 6.35, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide