Internal Torx, Internal Hex, External Hex, TX, Hex
AF, Imperial, Metric, Torx, SAE
9/16 ", 5/16 ", 5/8 ", 11/16 ", 1-1/2 "
1-1/2, 3/4, 2-1/2, 3/8, 1/2
9.53, 12.5, 6.35, 19.05, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide