Internal Torx, Internal Hex, External Hex, TX, Hex
Imperial, Torx, AF, Metric, SAE
5/8 ", 9 mm, 11 mm, 19 mm, 33 mm
3/4, 1, 2-1/2, 1-1/2, 3/8
25.4, 38.1, 6.35, 9.53, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide