Internal Torx, Hex, TX, External Torx, 6-Point
Imperial, Metric, AF, Torx, SAE
5/8 ", 9 mm, 7 mm, 11/16 ", 33 mm
1, 2-1/2, 1-1/2, 1/2, 3/4
38.1, 25.4, 6.35, 12.5, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide