Internal Torx, External Hex, Hex, TX, External Torx
Metric, Torx, AF, Imperial, SAE
5/16 ", 7/32 ", 9/32 ", 11/16 ", 15/16 "
1, 1-1/2, 2-1/2, 3/8, 1/2
19.05, 25.4, 9.53, 6.35, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide