Internal Hex, Internal Torx, External Hex, Hex, TX
Torx, AF, Imperial, SAE, Metric
1/2 ", 9 mm, 33 mm, 29 mm, 1-1/2 "
1-1/2, 2-1/2, 1/2, 1/4, 3/4
19.05, 38.1, 25.4, 9.53, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide