Internal Torx, Internal Hex, External Hex, Hex, TX
Imperial, Metric, Torx, AF, SAE
1 ", 5/16 ", 7/8 ", 5/8 ", 11/16 "
1-1/2, 3/4, 1, 1/2, 2-1/2
19.05, 9.53, 12.5, 25.4, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide