Internal Torx, External Hex, TX, Hex, External Torx
Imperial, Metric, AF, Torx, SAE
11/16 ", 5/8 ", 3/16 ", 36 mm, 29 mm
1-1/2, 1, 3/4, 2-1/2, 3/8
38.1, 19.05, 25.4, 9.53, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide