Internal Hex, Internal Torx, External Hex, TX, Hex
Torx, AF, Imperial, Metric, SAE
5/8 ", 7/8 ", 9/16 ", 9 mm, 11/16 "
1, 1/2, 1/4, 1-1/2, 2-1/2
19.05, 6.35, 9.53, 38.1, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide