External Hex, Internal Torx, TX, Hex, External Torx
Metric, AF, Torx, Imperial, SAE
9/16 ", 5 mm, 3/16 ", 11/16 ", 23 mm
1-1/2, 3/4, 1, 2-1/2, 1/2
12.5, 25.4, 38.1, 9.53, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide