Internal Torx, External Hex, Hex, TX, External Torx
Imperial, Metric, AF, Torx, SAE
3/8 ", 5/16 ", 13 mm, 11 mm, 35 mm
19.05, 25.4, 6.35, 9.53, 12.5
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide