Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, Torx, AF, Metric, SAE
1/2 ", 15/16 ", 13/16 ", 9/16 ", 5/16 "
1/4, 1, 1-1/2, 2-1/2, 3/8
9.53, 25.4, 38.1, 19.05, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide