Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, Torx, Metric, AF, SAE
7/32 ", 19 mm, 33 mm, 1-1/2 ", 11/16 "
3/4, 2-1/2, 3/8, 1-1/2, 1/2
9.53, 25.4, 6.35, 38.1, 19.05
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphatized, Oxidised, Black Phosphate, Black Oxide