Internal Torx, External Hex, Hex, TX, External Torx
Metric, AF, Imperial, Torx, SAE
4.5 mm, 5/16 ", 7/32 ", 7/16 ", 13 mm
3/4, 1, 1-1/2, 2-1/2, 1/4
38.1, 19.05, 25.4, 9.53, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide