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