Internal Torx, External Hex, TX, Hex, External Torx
Metric, AF, Torx, Imperial, SAE
7/32 ", 15/16 ", 18 mm, 5/16 ", 11/16 "
1/2, 1, 3/4, 2-1/2, 1-1/2
19.05, 38.1, 6.35, 12.5, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide