Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, Torx, Metric, AF, SAE
13 mm, 14 mm, 19 mm, 28 mm, 1-1/2 "
1/4, 3/4, 2-1/2, 1-1/2, 3/8
38.1, 6.35, 25.4, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide