External Torx, Internal Hex, TX, Hex, 6-Point
Metric, Torx, AF, Imperial, SAE
5/16 ", 3/8 ", 5/8 ", 23 mm, 32 mm
1-1/2, 3/4, 2-1/2, 3/8, 1/2
9.53, 38.1, 25.4, 6.35, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide