Internal Torx, External Hex, TX, Hex, External Torx
AF, Torx, Metric, Imperial, SAE
5 mm, 5/16 ", 5/8 ", 1-1/2 ", 11/16 "
1, 3/4, 2-1/2, 1-1/2, 3/8
25.4, 38.1, 19.05, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide