External Torx, External Hex, Internal Hex, TX, Hex
Imperial, AF, Torx, SAE, Metric
13 mm, 4 mm, 7/32 ", 9/32 ", 29 mm
6.35, 19.05, 9.53, 38.1, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide