Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, Torx, Metric, AF, SAE
9/16 ", 3/16 ", 7/16 ", 5/8 ", 11 mm
3/4, 1-1/2, 1/2, 2-1/2, 3/8
38.1, 6.35, 12.5, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide