External Torx, Internal Hex, External Hex, TX, Hex
Torx, Imperial, AF, Metric, SAE
5/16 ", 3/8 ", 9/16 ", 25 mm, 30 mm
3/4, 1/4, 2-1/2, 3/8, 1/2
38.1, 6.35, 19.05, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide