Internal Hex, Internal Torx, External Hex, TX, Hex
Torx, Metric, Imperial, AF, SAE
9 mm, 9/16 ", 28 mm, 1-1/2 ", 11/16 "
1-1/2, 1, 2-1/2, 1/2, 3/4
38.1, 19.05, 25.4, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide