Internal Torx, Internal Hex, External Hex, TX, Hex
Metric, Imperial, Torx, AF, SAE
15/16 ", 13/16 ", 3/8 ", 7/8 ", 9/16 "
3/4, 1-1/2, 1, 2-1/2, 1/2
38.1, 19.05, 6.35, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide