Internal Torx, External Torx, External Hex, Hex, TX
Imperial, Torx, AF, SAE, Metric
11/16 ", 15/16 ", 7/8 ", 5.5 mm, 19 mm
1-1/2, 3/8, 2-1/2, 1, 3/4
38.1, 19.05, 25.4, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide