Internal Torx, Internal Hex, External Hex, TX, Hex
Imperial, Torx, AF, SAE, Metric
9/16 ", 12 mm, 18 mm, 7/16 ", 1-1/2 "
38.1, 19.05, 25.4, 6.35, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide