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