External Hex, Internal Hex, Internal Torx, TX, Hex
Torx, AF, Imperial, SAE, Metric
15/16 ", 5/16 ", 7/8 ", 9/16 ", 11/16 "
1-1/2, 1/4, 1, 3/4, 2-1/2
38.1, 9.53, 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