Internal Torx, External Torx, External Hex, Hex, TX
Imperial, Metric, AF, Torx, SAE
15/16 ", 12 mm, 9/16 ", 3/16 ", 5/16 "
1/4, 3/4, 1, 2-1/2, 1-1/2
25.4, 38.1, 9.53, 6.35, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphated, Gun-metal, Oxidised, Black Phosphate, Black Oxide