Internal Hex, Internal Torx, External Hex, TX, Hex
AF, Torx, Imperial, Metric, SAE
5/8 ", 9/16 ", 34 mm, 1-1/2 ", 11/16 "
1-1/2, 1/2, 3/8, 2-1/2, 3/4
12.5, 38.1, 9.53, 6.35, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide