Internal Torx, External Hex, Hex, TX, External Torx
Imperial, Metric, AF, Torx, SAE
4.5 mm, 9/32 ", 9 mm, 5/8 ", 23 mm
38.1, 25.4, 19.05, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide