Internal Torx, Internal Hex, External Hex, Hex, TX
Imperial, Metric, Torx, AF, SAE
13/16 ", 3/16 ", 5/16 ", 7/16 ", 1-1/2 "
38.1, 25.4, 6.35, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide