Internal Hex, Internal Torx, External Hex, TX, Hex
Imperial, AF, Torx, Metric, SAE
11/16 ", 15/16 ", 5/16 ", 5/8 ", 9/16 "
1-1/2, 2-1/2, 1/2, 1/4, 3/4
12.5, 25.4, 9.53, 6.35, 38.1
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide