External Torx, Internal Hex, External Hex, TX, Hex
Imperial, AF, Torx, Metric, SAE
5/16 ", 7/16 ", 9/16 ", 3/16 ", 11/16 "
1, 1-1/2, 2-1/2, 1/2, 3/8
6.35, 25.4, 19.05, 12.5, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide