External Torx, Internal Torx, External Hex, Hex, TX
Metric, AF, Torx, Imperial, SAE
6 mm, 9/32 ", 7/8 ", 3/16 ", 5/16 "
1-1/2, 1, 2-1/2, 1/2, 3/4
6.35, 25.4, 12.5, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide