Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, Metric, AF, Torx, SAE
7/16 ", 11/16 ", 7/8 ", 3/16 ", 9 mm
3/4, 1, 2-1/2, 1-1/2, 1/4
19.05, 25.4, 9.53, 38.1, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide