Internal Hex, Internal Torx, External Hex, Hex, TX
Imperial, Torx, AF, Metric, SAE
7/32 ", 9/32 ", 6 mm, 5/8 ", 1-1/2 "
1-1/2, 1/4, 2-1/2, 3/8, 1/2
38.1, 6.35, 12.5, 19.05, 9.53
Special Steel, Molybdenum Steel, Alloy Steel, Steel, Chrome Molybdenum Alloy Steel
Gun-metal, Phosphated, Oxidised, Black Oxide, Black Phosphate