Internal Torx, Internal Hex, External Hex, TX, Hex
Metric, AF, Imperial, Torx, SAE
9/32 ", 5/16 ", 5/8 ", 3/16 ", 25 mm
38.1, 9.53, 6.35, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide