Internal Torx, Internal Hex, External Hex, Hex, TX
Torx, Imperial, AF, SAE, Metric
1/2 ", 3/16 ", 5/16 ", 5/8 ", 9/16 "
1/2, 1/4, 1-1/2, 1, 2-1/2
38.1, 9.53, 25.4, 6.35, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide