Internal Torx, Internal Hex, External Hex, Hex, TX
Metric, Imperial, Torx, AF, SAE
9/16 ", 5.5 mm, 7/16 ", 11/16 ", 19 mm
3/8, 1/4, 1-1/2, 2-1/2, 3/4
38.1, 19.05, 25.4, 9.53, 6.35
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide