Internal Torx, External Hex, Internal Hex, TX, Hex
Imperial, AF, Metric, Torx, SAE
5/8 ", 7/16 ", 9/16 ", 1-1/2 ", 11/16 "
3/8, 1-1/2, 3/4, 2-1/2, 1/2
19.05, 38.1, 9.53, 12.5, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide