Internal Hex, Internal Torx, External Hex, Hex, TX
Metric, AF, Imperial, Torx, SAE
15/16 ", 13/16 ", 5/16 ", 9/16 ", 11/16 "
1-1/2, 2-1/2, 1/2, 3/8, 3/4
38.1, 6.35, 19.05, 9.53, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Phosphatized, Gun-metal, Oxidised, Black Phosphate, Black Oxide