External Torx, External Hex, Internal Torx, TX, Hex
Metric, Torx, AF, Imperial, SAE
3/16 ", 5/16 ", 7/32 ", 3/8 ", 9/16 "
1/4, 2-1/2, 1-1/2, 3/8, 1/2
9.53, 38.1, 19.05, 12.5, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide