Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, AF, Torx, SAE, Metric
5/16 ", 5/8 ", 11/16 ", 25 mm, 35 mm
3/4, 1, 1-1/2, 2-1/2, 3/8
9.53, 6.35, 12.5, 19.05, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide