Internal Hex, Internal Torx, External Hex, Hex, TX
AF, Imperial, Torx, SAE, Metric
7/16 ", 7/8 ", 5/16 ", 9/16 ", 10 mm
3/4, 1, 1-1/2, 1/2, 2-1/2
38.1, 19.05, 25.4, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide