Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, Torx, AF, Metric, SAE
5/8 ", 9/16 ", 3/16 ", 14 mm, 1-1/2 "
3/4, 1, 1-1/2, 2-1/2, 1/4
38.1, 6.35, 9.53, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide