Internal Torx, Internal Hex, External Hex, TX, Hex
Metric, AF, Torx, Imperial, SAE
9/32 ", 9/16 ", 7/16 ", 11/16 ", 15/16 "
3/4, 1, 1-1/2, 2-1/2, 3/8
12.5, 6.35, 25.4, 38.1, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide