Internal Torx, Internal Hex, External Hex, TX, Hex
Metric, Torx, AF, Imperial, SAE
7/32 ", 9/32 ", 7/16 ", 15/16 ", 36 mm
3/4, 1/4, 1-1/2, 3/8, 1/2
9.53, 38.1, 19.05, 25.4, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide