External Torx, Internal Hex, External Hex, Hex, TX
Imperial, Metric, AF, Torx, SAE
3/4 ", 5/16 ", 5 mm, 13 mm, 11/16 "
1/2, 1-1/2, 3/4, 1/4, 2-1/2
38.1, 19.05, 6.35, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide