Internal Torx, External Hex, TX, Hex, External Torx
Metric, AF, Imperial, Torx, SAE
5/8 ", 9/16 ", 11 mm, 5/16 ", 33 mm
1/4, 3/4, 3/8, 2-1/2, 1-1/2
38.1, 19.05, 12.5, 25.4, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide