Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, Torx, Metric, AF, SAE
15/16 ", 7/8 ", 9/16 ", 5/8 ", 11/16 "
2-1/2, 1-1/2, 1/2, 3/8, 3/4
6.35, 38.1, 19.05, 25.4, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Phosphate, Black Oxide