Internal Torx, Internal Hex, External Hex, TX, Hex
AF, Imperial, Metric, Torx, SAE
7/16 ", 7/32 ", 9/32 ", 11/16 ", 25 mm
1, 1-1/2, 3/8, 2-1/2, 1/2
38.1, 19.05, 6.35, 12.5, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide