Internal Torx, External Hex, TX, Hex, 6-Point
Imperial, Torx, AF, Metric, SAE
11/16 ", 5/16 ", 5/8 ", 9 mm, 36 mm
3/4, 1/2, 3/8, 1/4, 2-1/2
25.4, 19.05, 38.1, 9.53, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide