External Hex, External Torx, Internal Torx, TX, Hex
Metric, AF, Torx, Imperial, SAE
9/16 ", 9 mm, 18 mm, 29 mm, 11/16 "
3/4, 1/4, 2-1/2, 1-1/2, 3/8
25.4, 19.05, 12.5, 38.1, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide