External Torx, External Hex, Internal Torx, TX, Hex
Metric, AF, Imperial, Torx, SAE
9/32 ", 13/16 ", 5/16 ", 5/8 ", 9/16 "
1/4, 1-1/2, 2-1/2, 1, 3/8
19.05, 12.5, 9.53, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide