External Torx, External Hex, Internal Hex, Hex, TX
Imperial, AF, Torx, SAE, Metric
13/16 ", 9/16 ", 3/16 ", 5.5 mm, 9 mm
1, 1-1/2, 2-1/2, 3/8, 1/2
9.53, 6.35, 25.4, 19.05, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Oxide, Black Phosphate