Internal Torx, External Torx, External Hex, Hex, TX
Imperial, Metric, AF, Torx, SAE
5/16 ", 9/32 ", 7/16 ", 11 mm, 5/8 "
3/8, 1/2, 3/4, 1-1/2, 2-1/2
9.53, 38.1, 19.05, 6.35, 25.4
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide